An underwater cavitation cleaning disk

Abstract

The present invention relates to an underwater cavitation cleaning disc, which comprises a disc body and a flow channel opened inside a central pipe. It is characterized in that: it further comprises a jet pipe, the jet pipes are circumferentially and equidistantly distributed along the central pipe, and the pipe heads of multiple jet pipes are inclined downward; multiple paddle plates, the multiple paddle plates are arranged on one side of the multiple jet pipes away from the orientation of the jet orifice; an upper ring groove is opened at one end of the disc body close to the paddle plates, and a lower ring groove is opened at the bottom end of the side wall of the disc body; an outer flow pipe, both ends of the outer flow pipe are respectively slidably connected to the upper ring groove and the lower ring groove, the port of the outer flow pipe close to the upper ring groove is a top flow port, the end of the outer flow pipe close to the lower ring groove is a bottom flow port, the top flow port faces the upper ring groove, and one end of the outer flow pipe close to the bottom flow port is fixedly connected to the jet pipe. The present invention has the effect of further improving the cleaning ability of the underwater cavitation cleaning disc and incidentally solving the problem that residues and sediment are likely to enter the inside of the cleaning disc during flushing.

Description

Technical Field

[0001] This application relates to the field of underwater cleaning equipment, and particularly to an underwater cavitation cleaning disk. Background Art

[0002] When a ship sails in the sea for a long time, substances such as dirt, salt, and seaweed are likely to accumulate on its surface. These substances can easily cause corrosion and damage to the hull, reducing the sailing life of the ship. They can also increase the resistance of the hull, resulting in the need for more fuel to maintain speed during sailing, and are more likely to affect the stability and maneuverability of the ship, increasing the risk of the ship encountering difficulties under adverse weather conditions. In summary, ships need to be regularly cleaned to reduce the likelihood of accidents and extend the service life of the hull.

[0003] The cavitation cleaning disk is one of the common devices in the ship cleaning process. It is mainly used to clean the underwater parts of the ship's side plates and bottom plates. It sprays high-speed water flow through spray holes or nozzles. The high-speed water flow sprays onto the surface to be cleaned, effectively removing attachments such as shellfish, algae, and dirt on the hull. In addition, when the water flow is sprayed through the spray holes or nozzles, the nearby liquid area is driven to form a high-speed flow, thereby generating a low-pressure area, creating a pressure difference with the surrounding area, and pressing the cavitation cleaning disk body against the hull surface.

[0004] Refer to a new cavitation jet cleaning disk with the application number 201610519207.9. The spray rotating nozzle disclosed in this document can rotate 360° for cleaning, with a larger cleaning range than the traditional single spray gun structure. For the surface cleaning of large-area ships, the cleaning time is greatly shortened. However, there are still a series of problems in the use process. For example, relying solely on the single flushing spray of water flow cannot remove impurities with strong adhesion, resulting in insufficient cleaning effect in some cases. Moreover, there is no protective component in this solution, making it easy for the splashed residues during cleaning to enter the inside of the rotating component.

[0005] In view of the above related technologies, the inventor believes that an improved underwater cavitation cleaning disk can be provided, mainly aiming to further improve the cleaning ability of the underwater cavitation cleaning disk and incidentally solve the problem that residues and sediment are likely to enter the inside of the cleaning disk during flushing. Summary of the Invention

[0006] In order to further improve the cleaning ability of the underwater cavitation cleaning disk and make up for the deficiencies in the background art, the present invention provides an underwater cavitation cleaning disk.

[0007] The underwater cavitation cleaning disk provided by the present invention adopts the following technical solutions:

[0008] An underwater cavitation cleaning disc comprises a disc body, a central tube arranged perpendicular to the disc body at the central axis inside the disc body, a flow channel opened inside the central tube, and the two ends of the disc body have different diameters, characterized in that: it also comprises;

[0009] A plurality of injection pipes, the plurality of injection pipes are distributed at equal intervals along the circumference of the central pipe, the injection pipes are connected to the flow channel, one end of the pipe head of the plurality of injection pipes is tilted downward, and when water flows out of one end of the pipe head of the injection pipe, the reverse thrust generated by the water flow can drive the plurality of injection pipes to rotate;

[0010] A plurality of paddle plates, wherein the plurality of paddle plates are arranged on a side of the plurality of injection pipes away from the injection port;

[0011] An annular groove, the annular groove is divided into an upper annular groove and a lower annular groove, the upper annular groove is opened at one end of the disc body close to the paddle board, and the lower annular groove is opened at the bottom end of the side wall of the disc body;

[0012] A plurality of outflow tubes, both ends of the plurality of outflow tubes are respectively slidably connected with the upper annular groove and the lower annular groove, one end of the outflow tube close to the upper annular groove is a top flow port, and one end of the outflow tube close to the lower annular groove is a bottom flow port, the top flow port faces the upper annular groove, one end of the outflow tube close to the bottom flow port is parallel to the side wall of the disk body and is fixedly connected to the injection pipe, the plurality of outflow tubes are evenly spaced along the circumference of the disk body, and the plurality of outflow tubes are fixedly connected to each other.

[0013] By adopting the above technical solution, water is injected into the jet pipe, and the jet pipe sprays water at high speed through the jet port. The water jet forms a reverse thrust on the jet pipe, which then drives the jet pipe to rotate. The rotation of the jet pipe stirs the water flow inside the cleaning disk, so that the water flow velocity inside the disk body is greater than the water flow velocity outside the disk body. According to the Bernoulli principle, negative pressure is formed inside the disk body. On the basis of exchanging free water with the outside through the lower annular groove, the water pressure presses the disk body to the cleaning side of the ship. Based on this, the rotation of the jet pipe drives the paddle board to rotate, and the paddle board stirs the water flow out of the upper annular groove, exerting a pressure perpendicular to the disk body, further strengthening the fit of the disk body to the cleaning side of the ship. In addition, the rotation of the jet pipe can also drive the rotation of the outflow pipe. The top flow port rotates along the upper annular groove, and part of the water flow stirred by the rotation of the paddle blade enters the top flow port, flows out from the lower annular groove along the flow channel, and is sprayed onto the hull, pre-spraying the outside of the cleaning disk. The debris with strong adhesion on the side plate of the hull is pre-cleaned by stirring the water flow through the external flow pipe and adding low-speed spraying. In a short time, the adhesion structure is destroyed, and the jet pipe flushes the adhesion at high speed, thereby improving the cleaning effect. In addition, by setting up an external flow pipe structure, the water flow around the cleaning disk is stirred with the rotation of the jet pipe, the water flow velocity is increased, and the pressure of the water body in the surrounding water area on the cleaning disk is further increased; the algae and aquatic plants adhering to the side wall of the ship can be removed by pre-spraying, which increases the cleaning area and further improves the cleaning efficiency.

[0014] Optionally, the tube bodies of each of the outer flow tubes are arranged in a plane parallel to the axial direction of the central tube.

[0015] By adopting the above technical solution, the water resistance is minimized. Water resistance is a problem that must be considered during underwater cleaning operations. For a linear single tube, the contact area is the most important factor affecting water resistance. Arranging the tube bodies of each outer flow tube in the same plane ensures no inclination and reduces the length to the minimum, thereby reducing the contact area with the water body; while arranging it parallel to the axial direction of the central tube can maximize the water flow agitation ability and effectively improve the fixing and cleaning ability of the cavitation cleaning disc.

[0016] Optionally, it further includes:

[0017] Multiple baffle plates, which are perpendicularly fixed to the side wall of the disc body and are evenly distributed along the side wall of the disc body at equal intervals.

[0018] By adopting the above technical solution, the water spout generated by agitation is destroyed. Due to the agitation of the outer flow tubes around the cleaning disc, while enhancing the water body agitation ability, it is easy to cause a water spout to form around the cleaning disc, which rolls up the surrounding waterweeds and algae to wrap the cavitation cleaning disc, not only affecting the cleaning ability of the cavitation cleaning disc, but also extremely likely to block the rotation of the outer flow tubes. The setting of the baffle plates destroys the swirling phenomenon and can diverge the water flow, which is very important for the normal operation of the cavitation cleaning disc.

[0019] Optionally, it further includes;

[0020] A filter screen, which is fixedly connected to one end of the central tube close to the injection tube, and the diameter of the filter screen is smaller than the pipe orifice spacing of the injection tube on the opposite side.

[0021] By adopting the above technical solution, the filter screen is arranged at one end of the disc body and is connected to the central tube at the edge, closing the intersection of the disc body and the outside. When the injection orifice of the injection tube injects water flow, it prevents the impurity substances stirred up by the water flow from entering the interior of the disc body, playing a role in blocking mud and sand; in addition, the filter screen can also be installed at other communication places inside and outside the disc body.

[0022] Optionally, an adjusting mechanism is provided on multiple paddle boards, and the adjusting mechanism is used to adjust the angle of the paddle boards.

[0023] By adopting the above technical solution, the adjustment mechanism adjusts the angle of the paddle board to achieve pressure regulation. The paddle board rotates synchronously with the injection pipe, pushing the water flow towards the abutting surface away from the disk body and the ship cleaning side to form a reaction force. Due to the instability of the liquid flow inside the disk body, the water pressure cannot be continuously and stably maintained in an ideal state. Therefore, it is necessary to set up an adjustment mechanism to establish a feedback mechanism through the reaction of the water flow on the paddle board to automatically adjust the angle of the paddle board, and then adjust the influence of the paddle board on the rotational flow rate of the water flow. When the water flow is stirred slightly faster, the paddle board angle tends to become vertical, reducing the reaction water volume to reduce the fixing effect of the cavitation cleaning disk; when the water flow is stirred slightly slower, the paddle board angle becomes inclined, increasing the reaction water volume, thereby increasing the fixing effect of the cavitation cleaning disk.

[0024] Optionally, multiple pieces of the paddle boards are inserted into the central pipe, and the adjustment mechanism is arranged between the paddle board and the central pipe. The adjustment mechanism includes;

[0025] A torsion spring, one end of the torsion spring is fixedly connected to one end of the paddle board, and the other end of the torsion spring is fixedly connected to the part where the central pipe is inserted into the paddle board.

[0026] By adopting the above technical solution, the reverse adjustment effect of the water flow on the paddle board is realized. In the initial state, the paddle board is in an inclined state, that is, it remains in the state of normally pushing the water flow out of the upper ring groove. When the negative pressure inside the disk body increases, that is, when the cavitation cleaning disk is difficult to move, the water flow velocity inside the disk body increases. The acting force of the water flow on the paddle board impacts the paddle board surface and turns vertical, reducing the push of the water flow along the axial direction of the central pipe. The fixing force of the disk body on the ship cleaning side weakens. Under the exchange of water flow with the outside world, the water flow inside the disk body cannot maintain a rapid speed for a long time, and the rapid water flow becomes gentle. Under the action of the torsion spring, the paddle board angle returns to the initial state, and the fixing force of the cavitation cleaning disk increases.

[0027] Optionally, it further includes;

[0028] A downstream ring, the downstream ring is arranged between the edge of the disk body and the edge of the filter screen, and the downstream ring is arranged directly below the nozzle of the injection pipe;

[0029] A flow splitting part, the flow splitting part is arranged on one side of the downstream ring close to the nozzle of the injection pipe, and the surface of the flow splitting part is curved.

[0030] By adopting the above technical solution, the cleaning area is expanded from the edge of the cavitation cleaning disk to the fitting part of the cavitation cleaning disk. Due to the limitation of the fixed direction of the injection port, most of the cavitation cleaning disks can only clean the edge part of the cavitation cleaning disk, and the cleaning personnel need to hold the cavitation cleaning disk and move it back and forth, which affects the efficiency. The setting of the downstream ring can split the high-speed water flow ejected from the injection pipe into two streams. One stream of water is ejected along the original trajectory line, and one stream of water is inclinedly guided by the flow splitting part to between the water spray nozzles of the cavitation cleaning disk.

[0031] Optionally, the curvature of the surface of the flow splitting part near the center of the downstream flow ring is smaller than the curvature of the surface of the flow splitting part far from the center of the downstream flow ring, and the part of the flow splitting part corresponding to the injection pipe is arranged in a pointed shape.

[0032] By adopting the above technical solution, the curvature of the surface of the flow splitting part is used to affect the flow velocity and flow splitting direction of the water flow after splitting. The part with a larger curvature of the flow splitting part is arranged in the direction of the original trajectory of the water flow, so that the water flow after splitting can maintain the same impact pressure as the original water flow. The part with a smaller curvature splits the original high-speed water flow towards the inside of the downstream flow ring, guiding the water flow to the area with the best scouring effect, ensuring the maximization of the scouring area on the inner side of the downstream flow ring and not interfering with the other water flow. It is worth mentioning that the pointed flow splitting part keeps the front end of the diversion direction consistent with the impact direction of the original water flow, reducing the impact of the high-speed water flow on the downstream flow ring and improving the problem that the water flow is scattered when encountering obstacles, and minimizing the influence on the water flow velocity.

[0033] To sum up, the present application includes at least one of the following beneficial technical effects:

[0034] 1. An outer flow pipe is arranged outside the disk body to rotate synchronously with the injection pipe, stirring the water body around the outside of the disk body. According to Bernoulli's principle, the faster the water body flows, the lower the water pressure. By increasing the water pressure around the disk body, the adhesion of the disk body to the ship surface is improved;

[0035] 2. Continuing from the above, there are also paddle boards that rotate synchronously with the injection pipe. The paddle boards spray outwards through the upper ring groove, forming a reverse thrust force to improve the adhesion effect. At the same time, part of the water flow flows into the outer flow pipe while being ejected from the upper ring groove, and is sprayed onto the ship surface through the outer flow pipe, pre-cleaning the side of the ship to be cleaned and pre-impacting the attachment structure of the sundries with stronger adhesion; while pre-cleaning, the outer flow pipe stirs the surrounding water body to assist in removing the attachments.

[0036] 3. The setting of the flow splitting ring serves to split the water flow ejected from the outer flow pipe into two branches, thereby respectively scouring the inner and outer sides of the flow splitting ring, increasing the effective scouring area of the cavitation cleaning disk, and improving the problem that the traditional cavitation cleaning disk cannot scour directly below the cleaning disk.

[0037] 4. A filter screen is also arranged between the flow splitting rings in the present application solution. When the water flow scours the attachments on the ship surface, it prevents the sundries splashed by the impact from entering the inside of the disk body from below the disk body, playing the role of protecting the internal components of the cavitation cleaning disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is the overall structural schematic diagram of the embodiment of the present application.

[0039] Figure 2 is the cross-sectional view of the embodiment of the present application.

[0040] Figure 3 is Figure 2 an enlarged view of part A.

[0041] Figure 4 is a structural schematic diagram drawn to highlight the internal structure of the disk body.

[0042] Description of reference numerals: 1. Disk body; 11. Universal wheel; 12. Central pipe; 13. Flow channel; 2. Jet pipe; 21. Jet port; 22. Fixed disk; 23. Bearing structure; 24. End face ball bearing; 25. Filter net; 26. Downstream ring; 261. Shunt part; 27. Retaining ring; 28. Upper ring groove; 29. Lower ring groove; 3. Paddle; 31. Mounting rod; 32. Torsion spring; 33. Mounting plate; 4. Outer flow pipe; 41. Upward flow port; 42. Downward flow port; 43. Flow baffle. Detailed implementation manners

[0043] The following further elaborates on this application in conjunction with the attached Figures 1-4 drawings.

[0044] An embodiment of this application discloses an underwater cavitation cleaning disk. Referring to Figure 1 , an underwater cavitation cleaning disk includes a disk body 1. The two ends of the disk body 1 have different diameters, and the side wall of the disk body 1 is inclined at both ends with different diameters. The cross-section of the disk body 1 is trapezoidal. For the convenience of description, the end of the disk body 1 with a smaller diameter is the top end, and correspondingly, the opposite end of the top end is the bottom side. Four universal wheels 11 are arranged at the bottom end of the disk body 1, and the four universal wheels 11 are respectively and evenly arranged on the edge of the disk body 1. A central pipe 12 perpendicular to the upper part of the disk body 1 is fixedly connected to the top side of the disk body 1. The central pipe 12 extends to the inside of the disk body 1, and a flow channel 13 is opened in the central pipe 12. One end of the central pipe 12 far from the disk body 1 is connected to a water pump (not shown in the figure). A water flow jetting assembly communicating with the flow channel 13 is arranged inside the disk body 1. The water pump, as a water supply component, injects water flow into the water flow jetting assembly at a high speed through the flow channel 13, and jets the water flow to the ship cleaning side through the water flow jetting assembly, so as to achieve the purpose of cleaning.

[0045] Referring to Figure 2 and Figure 3, the water jet assembly includes two jet pipes 2 fixedly connected to the central pipe 12. The two jet pipes 2 are in the same plane and are respectively fixedly connected to both ends of the cross-sectional diameter of the central pipe 12. Both jet pipes 2 are communicated with the flow channel 13. The ends of the two jet pipes 2 away from the central pipe 12 are arranged close to the inner side wall of the disc body 1. The ends of the two jet pipes 2 away from the central pipe 12 are provided with jet orifices 21. The parts of the two jet pipes 2 close to the jet orifices 21 are arranged to be relatively inclined longitudinally and transversely with respect to the pipe bodies of the jet pipes 2, and the inclination directions are opposite. The ends of the jet orifices 21 of the two jet pipes 2 are close to the bottom of the side wall of the disc body 1. When the water pump is started and the valve is opened, the water pump continuously sends water into the interior of the disc body 1 through flow. The water flow is divided at the diversion of the two jet pipes 2 and the jet orifices 21 and is ejected from the jet orifices 21 of the two jet pipes 2. While the inclined jet orifice 21 ejects water flow outwards, it also pushes the jet pipe 2 to rotate in the opposite direction. The opposite inclination directions of the two jet pipes 2 cause the reaction forces of the two jet orifices 21 on the jet pipes 2 to be superimposed. The two jet pipes 2 rotate to stir the water flow, accelerating the fluidity of the water flow inside the disc body 1. According to Bernoulli's principle, the lower the water pressure in the part where the water flow velocity is faster. A negative pressure is formed inside the disc body 1 under the condition of exchanging with the external free water flow. The water pressure presses the disc body 1 stably on the ship cleaning surface. However, relying only on the water flow to push the jet pipe 2 to rotate easily causes the internal water flow velocity to be too fast, that is, the pressure difference is too large. Therefore, a negative feedback mechanism should be established on the basis of the rotation of the jet pipe 2 to adjust the rotation speed of the jet pipe 2, and then adjust the pressure difference inside and outside the disc body 1. In addition, it should be noted that for the number of jet pipes 2, two are the most suitable. Considering the problem of the high-pressure water flow diversion ejected by the water pump, too many jet pipes 2 will result in a fast water flow velocity but a too small flow rate for a certain volume of the outflow pipe 4 after diversion, greatly affecting the impact force and scouring effect of the water flow on the ship cleaning side.

[0046] Refer to Figure 2 And Figure 3, a plurality of paddle plates 3 are inserted in the same plane between the central pipe 12 and the part inside the disk body 1. The plurality of paddle plates 3 are arranged above the injection pipe 2. The plurality of paddle plates 3 are evenly distributed along the circumferential direction of the central pipe 12. One end of each of the plurality of paddle plates 3 close to the central pipe 12 is fixedly connected with an installation rod 31. The central pipe 12 is provided with a slot adapted to the installation rod 31 corresponding to each installation rod 31. The installation rod 31 is inserted into the slot. A torsion spring 32 is sleeved outside the installation rod 31. The axial direction of the torsion spring 32 is parallel to the axial direction of the installation rod 31. One end of the paddle plate 3 close to the torsion spring 32 is provided with an installation plate 33 for fixedly connecting with one end of the torsion spring 32. The end of the torsion spring 32 far from the installation plate 33 is fixedly connected to the part of the central pipe 12 connected to the installation rod 31. In traditional cavitation cleaning disks, there are also settings for the paddle plates 3. However, the paddle plates 3 are only combined with the drain outlet at the top of the disk body 1 to discharge the water flow to the outside, bringing a reaction force to the cavitation cleaning disk, thereby increasing the adhesion of the disk body 1. Based on this, on the basis of retaining the traditional paddle plates 3, a simple and effective feedback mechanism is established by using the torsion spring 32 to flexibly adjust the problem of excessive internal pressure difference of the disk body 1 by controlling the rotation speed of the water flow inside the disk body 1. Based on this, the inserted connection method can not only satisfy the synchronous rotation of the plurality of paddle plates 3 and the central pipe 12, but also satisfy the self-rotation of the paddle plates 3 along the installation rod 31; the paddle plates 3 rotate synchronously with the injection pipe 2 to stir the water flow inside the disk body 1. Since the injection pipe 2, as the active part driving the rotation of the paddle plates 3, lacks control ability, the stirred water flow acts on the injection pipe 2 to accelerate the rotation of the injection pipe 2. Under the chain effect, the agitation of the water flow is likely to be too fast; its main adjustment principle is: in the initial state, in order to push the internal water flow towards the outside, the angle of the paddle plate 3 remains inclined. In order to increase the agitation effect, the blade area of the paddle plate 3 close to the side wall of the disk body 1 is larger. The acceleration of the water flow inside the disk body 1 is mainly reflected in the increased rolling speed of the water flow near the side wall of the disk body 1. The accelerated water flow impacts the paddle plate 3, changing the paddle plate 3 from inclined to vertical, reducing the drainage volume of the paddle plate 3 towards the outside of the disk body 1, so as to reduce the drainage volume of the disk body 1, thereby reducing the reaction force of the top side of the disk body 1 towards the outside and alleviating the situation of excessive pressure on the cavitation cleaning disk; under the action of the paddle plate 3, when the water flow velocity slows down, the impact force of the water flow on the paddle plate 3 decreases. Under the action of the torsion spring 32, the inclination degree of the paddle plate 3 changes in real time with the impact force, and the paddle plate 3 gradually recovers the ability to push the water flow. Under the unstable thrust of the rotating water flow, the whole paddle plate 3 shows a tendency to return to the initial state until the paddle plate 3 slowly returns to the initial inclined state.

[0047] Refer to Figure 2 And Figure 4A fixed plate 22 is fixedly connected to the part of the top side of the disk body 1 that is connected to the center tube 12. A part of the fixed plate 22 is arranged on the outside of the disk body 1, and the part of the fixed plate 22 arranged on the inside of the disk body 1 serves as a bearing structure 23, which is connected to a plurality of end ball bearings 24 that can withstand axial forces. The plurality of bearings are sequentially sleeved on the side wall of the center tube 12; a bearing structure 23 is fixedly connected to one end of the center tube 12 close to the bottom side of the disk body 1, which is connected to an end ball bearing 24 that can withstand axial forces. The bearing in this scheme needs to be an end ball bearing 24 that can withstand axial force. Since the water flow gives the same reaction force to the paddle board 3 while the paddle board rotates, the paddle board 3 tends to move axially along the center tube 12. The paddle board 3 transmits the axial force to the center tube 12. The inner ring of the bearing clamped on the center tube 12 and the outer ring of the bearing fixed on the bearing structure 23 tend to be relatively offset. Therefore, it is recommended to use an end ball bearing 24 with a strong axial force bearing capacity; in addition, due to the uncertainty of the water pressure pushing the injection pipe 2, the axis of the center tube 12 is not in a continuous vertical trend with the top cover of the disk body 1. The axial bearing pressure of the end ball bearing 24 ensures that the rotation function is not affected when the coaxiality of the rotating shell axis and the center shaft axis deviates; in addition, in order to ensure the sealing performance, sealing rings can be installed on both sides of the center tube 12 corresponding to the injection pipe 2.

[0048] Reference Figure 4 , a filter screen 25 fixedly connected to the central tube 12 is arranged at the bottom end of the disc body 1, and the filter screen 25 covers the bottom end face of the disc body 1, isolating the inside and outside of the disc body 1, and the edge of the filter screen 25 is arranged near the nozzle of the jet pipe 2 but does not cover the nozzle of the jet pipe 2; a circle of support rods for supporting the filter screen 25 is fixedly connected to the side wall of the central tube 12 in the circumferential direction. For the convenience of display, the filter screen 25 shown in the figure has a large diameter, but the actual application filter screen 25 has a smaller and denser diameter. While the jet pipe 2 rotates and sprays, the attachments scattered on the cleaning surface of the ship are filtered out by the filter screen 25, preventing large-volume debris from entering the inside of the disc body 1 and hindering the rotation of the paddle 3 and the jet pipe 2.

[0049] Reference Figure 4, a downstream ring 26 is fixedly connected to the lower part of the edge of the filter net 25 corresponding to the nozzle of the injection pipe 2. A flow dividing part 261 is fixedly connected to one side of the downstream ring 26 close to the nozzle of the injection pipe 2. The flow dividing part 261 divides the water flow ejected from the nozzle of the injection pipe 2. The flow dividing part 261 is divided into two parts directly below the trajectory line of the nozzle of the injection pipe 2. The curvature of the part of the flow dividing part 261 facing the outside of the downstream ring 26 is greater than that of the part of the flow dividing part 261 facing the inside of the downstream ring 26. The curvature of the part of the flow dividing part 261 facing the inside of the downstream ring 26 gradually decreases; the four universal wheels 11 are circumferentially distributed on one side of the downstream ring 26 away from the nozzle of the injection pipe 2. The flow dividing part 261 of the downstream ring 26 divides the water flow ejected from the injection pipe 2 at high speed into two parts. One branch flows along the trajectory line of the original water flow. The curvature of the part of the flow dividing part 261 corresponding to this branch should be generally consistent with the inclination degree of the end of the injection port 21 of the injection pipe 2 to ensure that the water flow impacts the ship cleaning surface at the original speed and prevent the erosion ability of the injection pipe 2 from being weakened due to excessive loss of water flow speed; after the diversion, one branch is led to the inside of the downstream ring 26 by a part of the flow dividing part 261, corresponding to the part below the filter net 25 of the disk body 1. The slope of the part of the flow dividing part 261 corresponding to this branch gradually becomes gentle, which is to reduce the blocking ability of the water flow. From the perspective of the physical structure, while ensuring the change of direction, the loss of water flow speed is reduced as much as possible to ensure the effectiveness of the impact force of the high-speed water flow.

[0050] Refer to Figure 1 And Figure 4, a retaining ring 27 is fixedly connected to the part of the downstream ring 26 corresponding to the bottom end of the side wall of the disk body 1. The diameter of the retaining ring 27 is equal to the diameter of the bottom end part of the side wall of the disk body 1. An upper ring groove 28 is formed at the top end of the disk body 1. A filter screen 25 is arranged on the inner bottom wall of the upper ring groove 28. The diameter of the filter screen 25 arranged at the upper ring groove 28 is larger than the diameter of the filter screen 25 arranged at the bottom end of the disk body 1. A lower ring groove 29 is formed between the side wall of the disk body 1 and the retaining ring 27. Two outflow pipes 4 with the same structure and shape are slidably connected in the upper ring groove 28 and the lower ring groove 29 at the same time. One end port of the outflow pipe 4 close to the upper ring groove 28 is a top flow port 41, and one end port of the flow pipe 4 close to the lower ring groove 29 is a bottom flow port 42. The two outflow pipes 4 are bent along the side wall of the disk body 1. The two outflow pipes 4 are arranged in the same horizontal plane. The bottom end of the outflow pipe 4 is fixedly connected to the injection pipe 2. A plurality of baffle plates 43 perpendicular to the side wall of the disk body 1 are axially arranged on the side wall of the disk body 1. The baffle plates 43 are circumferentially distributed at equal intervals along the side wall of the disk body 1. The outflow pipe 4 rotates synchronously with the injection pipe 2. While the injection pipe 2 rotates, it can stir the water body around the disk body 1, reduce the pressure energy at the outer edge of the disk body 1, and the water flow rushes towards the disk body 1 to help the disk body 1 be fixed on the outer side plate of the ship. Due to the continuous rotation of the outflow pipe 4, a part of the water flow pushed out by the paddle 3 from the upper ring groove 28 is sucked into the outflow pipe 4 from the top flow port 41, and the pushed water flow is discharged from the bottom flow port 42 of the outflow pipe 4, scouring the periphery of the disk body 1. With the continuous stirring action of the outflow pipe 4, the viscous structure of the attachments around the disk body 1 is destroyed, making up for the deficiency of the single - time scouring effect of the traditional high - speed water flow. It is worth mentioning that a part of the bottom flow port 42 of the outflow pipe 4 can overlap with the position of the injection branch of the injection pipe 2, so as to further enhance the cleaning effect on the ship adhesives. It can also be arranged outside the injection point of the injection pipe 2 to increase the cleaning area of the disk body 1 and perform pre - scouring before the high - speed water flow flushing to pre - destroy the physical structure of the attachments. The baffle plate 43 plays a role in preventing flow disturbance when the outflow pipe 4 stirs, preventing the disturbed water flow from being too close to the disk body 1, resulting in the entanglement of linear and sheet - like objects on the disk body 1 and interfering with the rotation of the outflow pipe 4 and the movement of the cavitation cleaning disk.

[0051] The implementation principle of an underwater cavitation cleaning disk in an embodiment of the present application is as follows: The cavitation cleaning disk is generally used for cleaning the underwater part of a ship. A diver presses the cavitation cleaning disk against the side plate of the ship. While cleaning, the side plate of the ship is pushed to slide on the side plate of the ship. The cavitation cleaning disk is supplied with water by a water pump. The water flow is sprayed at high speed onto the ship surface through the internal injection pipe 2. At the same time, the water flow pushes the injection pipe 2 to rotate in the opposite direction, driving the water flow velocity inside the disk body 1 to increase. According to Bernoulli's principle, the pressure energy inside the disk body 1 decreases, and the water body presses the cavitation cleaning disk against the ship cleaning surface.

[0052] In practical applications, due to the limitations of underwater manual operations, generally, workers push the cavitation cleaning disk to the part to be cleaned. Under the action of gravity, the cavitation cleaning disk slides down along the ship's side plate by itself and cleans the ship's surface while sliding. However, there are inevitably some sundries with strong adhesion on the hull, which need to be manually cleaned by workers, resulting in low cleaning efficiency. And in some cases, for a single jet cleaning, only most of the adhesion structures of the adhesive may be damaged, and there is still a small part of the adhesive sticking to the hull that needs to be manually torn off by workers. Based on this, this solution increases the cleaning effect of stirring and jet mixing by adding pre-cleaning, pre-damaging the adhesion structure of the adhesive, and then making a jet by the jet pipe 2 will greatly improve the cleaning effect, improve the problem of incomplete damage to the adhesion structure of the adhesive, and increase the cleaning area and cleaning effect of the disk body 1.

[0053] Details of the implementation principle of this solution: The water pump continuously sends water into the inside of the disk body 1 through flow. The water flow is divided at the diversion of the two jet pipes 2 and the jet orifice 21 and jets out from the jet orifices 21 of the two jet pipes 2. While one end of the inclined jet orifice 21 jets water outwards, it also pushes the jet pipe 2 to rotate in the opposite direction. The inclined ends of the two jet pipes 2 are arranged in opposite directions, so that the reaction forces of the two jet orifices 21 on the jet pipe 2 are superimposed, and the two jet pipes 2 rotate to stir the water flow, accelerating the fluidity of the water flow inside the disk body 1. According to Bernoulli's principle, the water pressure is lower in the part where the water flow velocity is faster. A negative pressure is formed inside the disk body 1 under the condition of exchanging with the external free water flow, and the water body presses the disk body 1 stably on the ship's cleaning surface.

[0054] In traditional cavitation cleaning trays, there are also settings regarding the paddle 3. However, the paddle 3 is only combined with the drain outlet at the top of the tray body 1 to discharge the water flow to the outside, which brings a reaction force to the cavitation cleaning tray, thereby increasing the adhesion of the tray body 1 of the cavitation cleaning tray. In this solution, the paddle 3 under the traditional function also establishes a simple and effective feedback mechanism with the torsion spring 32. By controlling the rotation speed of the water flow inside the tray body 1, the problem of excessive internal pressure difference of the tray body 1 can be flexibly adjusted. Based on this, the plug-in connection method can not only satisfy the synchronous rotation of multiple paddles 3 and the central pipe 12, but also satisfy the self-rotation of the paddle 3 along the mounting rod 31; the paddle 3 rotates synchronously with the spray pipe 2 to stir the water flow inside the tray body 1. Since the spray pipe 2, as the driving part for driving the paddle 3 to rotate, lacks control ability, the stirred water flow acting on the spray pipe 2 can accelerate the rotation of the spray pipe 2. Under the chain effect, the agitation of the water flow is likely to be too fast; its main adjustment principle is as follows: In the initial state, in order to push the internal water flow towards the outside, the angle of the paddle 3 remains inclined. In order to increase the agitation effect, the paddle area at the end of the paddle 3 close to the side wall of the tray body 1 is larger. The acceleration of the internal water flow in the tray body 1 is mainly reflected in the increased rolling speed of the water flow near the side wall of the tray body 1. The accelerated water flow impacts the paddle 3, changing the paddle 3 from inclined to vertical, reducing the drainage volume of the paddle 3 towards the outside of the tray body 1, so as to reduce the drainage volume of the tray body 1, thereby reducing the reaction force towards the outside on the top side of the tray body 1 and alleviating the situation of excessive pressure on the cavitation cleaning tray; under the action of the paddle 3, when the water flow velocity slows down, the impact force of the water flow on the paddle 3 decreases. Under the action of the torsion spring 32, the inclination degree of the paddle 3 changes in real time with the impact force, and the paddle 3 gradually recovers the ability to push the water flow. Under the unstable thrust of the rotating water flow, the whole paddle 3 shows a tendency to return to the initial state until the paddle 3 slowly returns to the initial inclined state.

[0055] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An underwater cavitation cleaning disc, comprising a disc body (1), a central tube (12) perpendicularly arranged at the central axis inside the disc body (1), and a flow channel (13) opened inside the central tube (12). The two ends of the disc body (1) have different diameters. It is characterized in that: It also includes; Multiple injection tubes (2), which are circumferentially and equidistantly distributed along the central tube (12). The injection tubes (2) are communicated with the flow channel (13). One end of the tube head of the multiple injection tubes (2) is inclined downward. When water flows out from one end of the tube head of the injection tube (2), the reaction force generated by the water flow can drive the multiple injection tubes (2) to rotate; Multiple paddle plates (3), which are arranged on the side of the multiple injection tubes (2) away from the direction of the injection port (21); An upper ring groove (28) and a lower ring groove (29). The upper ring groove (28) is opened at one end of the disc body (1) close to the paddle plate (3), and the lower ring groove (29) is opened at the bottom end of the side wall of the disc body (1); Multiple outer flow tubes (4), the two ends of the multiple outer flow tubes (4) are respectively slidably connected with the upper ring groove (28) and the lower ring groove (29). One end port of the outer flow tube (4) close to the upper ring groove (28) is a top flow port (41), and one end of the outer flow tube (4) close to the lower ring groove (29) is a bottom flow port (42). The top flow port (41) faces the upper ring groove (28). One end of the outer flow tube (4) close to the bottom flow port (42) is parallel to the side wall of the disc body (1) and is fixedly connected with the injection tube (2). The multiple outer flow tubes (4) are circumferentially and equidistantly distributed along the disc body (1), and the multiple outer flow tubes (4) are fixedly connected to each other; Multiple baffle plates (43), which are perpendicularly fixedly connected to the side wall of the disc body (1) and are equidistantly distributed along the side wall of the disc body (1); An adjusting mechanism is arranged on the multiple paddle plates (3), and the adjusting mechanism is used to adjust the angle of the paddle plate (3); The multiple paddle plates (3) are inserted into the central tube (12), and the adjusting mechanism is arranged between the paddle plate (3) and the central tube (12). The adjusting mechanism includes; A torsion spring (32), one end of the torsion spring (32) is fixedly connected to one end of the paddle plate (3), and the other end of the torsion spring (32) is fixedly connected to the part of the central tube (12) inserted into the paddle plate (3).

2. An underwater cavitation cleaning disc according to claim 1, It is characterized in that: The tube body of each outer flow tube (4) is arranged in a plane, and this plane is parallel to the axial direction of the central tube (12).

3. An underwater cavitation cleaning disc according to claim 1, It is characterized in that: It also includes; A filter screen (25), which is fixedly connected to one end of the central tube (12) close to the injection tube (2). The diameter of the filter screen (25) is smaller than the pipe orifice spacing of the injection tube (2) on the opposite side.

4. An underwater cavitation cleaning disc according to claim 3, It is characterized in that: It also includes; A downstream flow ring (26), the downstream flow ring (26) is arranged between the edge of the disk body (1) and the edge of the filter net (25), and the downstream flow ring (26) is arranged directly below the nozzle of the injection pipe (2); A flow splitting part (261), the flow splitting part (261) is arranged on one side of the downstream flow ring (26) close to the nozzle of the injection pipe (2), and the surface of the flow splitting part (261) is curved; 5. An underwater cavitation cleaning disk according to claim 4, characterized in that: The curvature of the surface of the flow splitting part (261) on the side close to the center of the downstream flow ring (26) is smaller than the curvature of the surface of the flow splitting part (261) on the side far from the center of the downstream flow ring (26), and the part of the flow splitting part (261) corresponding to the injection pipe (2) is arranged in a pointed shape.

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