A multi-stage filtration system for ballast water treatment system

Abstract

The present application relates to a multi-stage filtration system for a ballast water treatment system, and relates to the technical field of ballast water systems. The system includes a delivery mechanism for delivering ballast water, the delivery mechanism including several groups of delivery pipes and filter units sequentially connected between the delivery pipes at intervals; each filter unit includes several groups of diverter pipes, a filter screen disposed within each group of diverter pipes, and two groups of switching components; all diverter pipes are arranged in parallel between adjacent delivery pipes, one end of each diverter pipe in the longitudinal direction is connected to one group of switching components, and the other end of each diverter pipe is connected to another group of switching components. The two switching components are arranged in a one-to-one correspondence with the two adjacent groups of delivery pipes, and each switching component is connected to the corresponding delivery pipe. The switching component is used to switch the diverter pipe connected to the delivery pipe, and the mesh size of all the filter screens decreases sequentially along the flow direction of the ballast water. The present application has the effect of improving the practicality of the filter screen.

Description

Technical Field

[0001] The present application relates to the technical field of ballast water systems, and in particular to a multi-stage filtration system of a ballast water treatment system. Background Art

[0002] The ballast water system mainly consists of ballast water pumps, ballast water pipelines, ballast tanks and related valves. The function of the system is to inject or discharge ballast water into or out of the ballast tanks of the entire ship according to the needs of ship operation, so as to adjust the ship's draft and the longitudinal and transverse stability and safe metacentric height of the hull and improve the seaworthiness of empty tanks, etc.

[0003] In related technologies, ships use water pumps to pump seawater for storage and discharge of ballast water. Since seawater contains a large amount of impurities such as plankton, microorganisms and algae, in order to reduce the microbial invasion and pollution problems caused by ship ballast water, a filtration device is usually installed to filter the ballast water during the process of pumping seawater for ballast water storage.

[0004] Regarding the above-mentioned related technologies, in the actual process of ballast water filtration, a filter mesh is generally used as a filtering device. However, due to the limitation of its own mesh size, the filter mesh can only filter impurities in the ballast water that are larger than the mesh size; when the mesh size of the filter mesh is small, the filter mesh is prone to accumulate a large amount of impurities and cause blockage, so it needs to be cleaned frequently; when the mesh size of the filter mesh is large, the filtering capacity of the ballast water is too low, resulting in poor practicality of the filter mesh, so it needs to be improved. Summary of the Invention

[0005] In order to improve the practicality of the filter screen, the present application provides a multi-stage filtration system for a ballast water treatment system.

[0006] The multi-stage filtration system of the ballast water treatment system provided in this application adopts the following technical solutions:

[0007] A multi-stage filtration system of a ballast water treatment system includes a conveying mechanism for conveying ballast water, the conveying mechanism including several groups of conveying pipes and filter units connected in sequence between the conveying pipes; each of the filter units includes several groups of diversion pipes, a filter screen arranged inside each group of diversion pipes and two groups of switching components; all the diversion pipes are arranged in parallel between adjacent conveying pipes, one end of all the diversion pipes in the length direction is connected to one group of switching components, and the other end of all the diversion pipes is connected to the other group of switching components, the two switching components are arranged in a one-to-one correspondence with the two groups of conveying pipes adjacent to the diversion pipes, and each switching component is connected to the corresponding conveying pipe, the switching component is used to switch the diversion pipe connected to the conveying pipe, and the mesh size of all the filter screens decreases in sequence along the flow direction of ballast water inside the conveying mechanism.

[0008] By adopting the above technical solution, the ballast water flows through filters with different filtration accuracies in sequence along the length direction of the conveying mechanism to achieve multi-stage filtration of the ballast water, so that impurities of different volume sizes stay in different filter screens. On the premise of ensuring the filtration accuracy of the conveying mechanism for the ballast water, it also reduces the accumulation of impurities in the ballast water in one place, which causes the filter screen to need frequent cleaning, thereby improving the practicality of the filter screen; when too many impurities accumulate in the filter screen inside a certain diversion pipe and need to be cleaned, the switching component is used to select another group of diversion pipes of the same filter unit to connect with the conveying pipe, which ensures the continuous operation of the overall conveying mechanism and facilitates the cleaning of the clogged filter screen, thereby improving the practicality of the filter unit.

[0009] Preferably, the switching assembly includes a connecting box, a switching disk, a rotating shaft, a switching motor, a mounting ring, an elastic member and an oscillating ball; the connecting box is connected between all the shunt pipes and the corresponding delivery pipes, and the switching disk is rotatably arranged inside the connecting box to close the connection between all the shunt pipes and the connecting box, and a space for liquid circulation is reserved between the switching disk and the delivery pipe, and a switching port for connecting the shunt pipe and the delivery pipe is provided on the switching disk; the rotating shaft is provided on the switching disk, and one end of the rotating shaft passes through the connecting box, and the switching motor is provided on the connecting box to drive the rotating shaft to rotate; the mounting ring is sleeved on the rotating shaft, and the side wall of the mounting ring is provided with a mounting groove, the oscillating ball is slidably arranged inside the mounting groove, and the elastic member is provided inside the mounting groove to drive the oscillating ball out of the mounting groove; the side wall of the connecting box is provided with a plurality of groups of impact grooves for the oscillating ball to be inserted into, and all the impact grooves are distributed along the circumference of the rotating shaft, and the impact grooves and shunt pipes are provided in a one-to-one correspondence.

[0010] By adopting the above technical solution, the output end of the switching motor drives the rotating shaft and the switching disk to rotate, so that the mounting ring drives the oscillation ball to move circumferentially on the connecting box. When the elastic part drives the oscillation ball into a certain impact groove and makes a sound, it can be quickly known that the switching port is connected to a certain diversion pipe, so as to control the switching motor to stop working in time, thereby ensuring the connection between the switching port and the diversion pipe, and realizing the rapid switching of the diversion pipe and the delivery pipe.

[0011] Preferably, each of the diversion pipes is provided with a scraping assembly for scraping dirt on the filter plate, each of the diversion pipes is connected to a drain pipe, the drain pipe is connected to a valve, each of the diversion pipes is provided with a conveying assembly for conveying dirt to the inside of the drain pipe, and a cleaning assembly for cleaning the conveying assembly is provided inside the drain pipe.

[0012] By adopting the above technical solution, the scraping component scrapes the dirt attached to the filter plate, the conveying component conveys the dirt to the inside of the sewage pipe, and the cleaning component is used to clean the dirt on the conveying component, so that the sewage mixed with dirt is discharged through the sewage pipe, thereby realizing rapid cleaning of the filter net.

[0013] Preferably, the scraping assembly includes a driving member, a scraping plate and an extension plate; the scraping plate is slidably arranged inside the diversion pipe along the height direction of the filter screen, the scraping plate and the filter screen are distributed in sequence along the flow direction of the ballast water, and the side walls of the scraping plate are both against the filter screen, and the driving member is arranged on the diversion pipe to drive the scraping plate to move; the extension plate is arranged at the end of the scraping plate away from the filter screen, and the extension plate is located on the side of the scraping plate facing the conveying assembly.

[0014] By adopting the above technical solution, the output end of the driving member is controlled to extend, so that the scraper plate and the extension plate slide, and the scraper plate is pressed against the filter screen to scrape off the dirt attached to the surface of the filter screen; in addition, the extension plate reduces the impact of the ballast water inside the diversion pipe on the dirt on the scraper plate, and when there is a lot of dirt attached to the scraper plate, the dirt on the scraper plate can move toward the extension plate, reducing the phenomenon of dirt attached to the scraper plate falling off the scraper plate.

[0015] Preferably, the conveying assembly includes a partition plate, a conveying plate and a pushing member; the partition plate is arranged on the inner side wall of the diversion pipe, and the partition plate is located on the side of the filter screen facing the scraper plate; the scraper plate is located between the partition plate and the filter screen, and the length direction of the partition plate is parallel to the length direction of the scraper plate; the conveying plate is slidably arranged inside the diversion pipe along the length direction of the partition plate, and the conveying plate can be abutted against the filter screen, the partition plate, the scraper plate and the extension plate, and a passage for the conveying plate to pass through is provided at the connection between the diversion pipe and the sewage pipe; the pushing member is arranged on the diversion pipe to drive the conveying plate to slide.

[0016] By adopting the above technical solution, when the driving member drives the extension plate to collide with the partition plate, the scraping plate, extension plate, partition plate, filter screen and the inner side wall of the diversion pipe form a channel for only the movement of the conveying plate, so that the pushing member drives the conveying plate to move and scrape off the dirt attached to the filter screen, scraping plate and extension plate, thereby realizing the rapid transfer of dirt to the inside of the sewage pipe.

[0017] Preferably, the cleaning assembly includes two groups of water inlet pipes, a water supply pipe, a pressure pump and several groups of nozzles; the two water inlet pipes are arranged on the outer wall of the sewage pipe, and the sewage pipe is located between the two groups of water inlet pipes; the water supply pipe is connected and arranged between the two groups of water inlet pipes to supply water to the two groups of water inlet pipes, the pressure pump is arranged on the water supply pipe, and all the nozzles are arranged on the side wall of each group of water inlet pipes facing the sewage pipe, and each of the nozzles passes through the sewage pipe.

[0018] By adopting the above technical solution, the pressure pump increases the water pressure inside the water supply pipe, so that the water inlet pipe and the nozzle can use high-pressure water to clean the dirt attached to the conveying plate, thereby realizing rapid cleaning of the conveying plate; the two sets of opposing water inlet pipes reduce the difficulty of cleaning the end of the conveying plate farthest from the water inlet pipe due to the inconvenience of the single-sided water inlet pipe, thereby improving the cleaning effect and efficiency of the cleaning component on the conveying plate.

[0019] Preferably, the cleaning assembly also includes a scraper, a limiting rod, an adjusting cylinder and a rotating motor; the scraper is slidingly arranged inside the sewage pipe, the limiting rod is arranged inside the sewage pipe, the limiting rod passes through the scraper, and the output direction of the nozzle is intersected with the sliding direction of the scraper; the adjusting cylinder is rotatably arranged at the connection point between the water supply pipe and the two sets of water inlet pipes, and the rotating motor is arranged on the water supply pipe to drive the adjusting cylinder to rotate; the interior of the adjusting cylinder is connected to the interior of the water supply pipe, and water holes for connecting different water inlet pipes are relatively penetrated on both sides in the width direction of the adjusting cylinder, and the inner diameters of the relative water holes are different.

[0020] By adopting the above technical solution, a rotating motor is used to drive the adjusting cylinder to rotate, so that water holes of different sizes are connected to different water inlet pipes, so that there is a pressure difference in the water pressure inside the two groups of water inlet pipes. The different water pressure differences are used to drive the scraper to slide back and forth along the length direction of the limit rod, and the scraper is used to scrape off the dirt attached to the conveying plate, thereby improving the cleaning effect and cleaning efficiency of the cleaning component on the conveying plate.

[0021] Preferably, a cleaning part is provided inside each of the diversion pipes so as to slide along the length direction of the diversion pipe, the filter screen and the cleaning part are distributed in sequence along the flow direction of the ballast water, a dredging rod for dredging the filter screen is provided on the side wall of the cleaning part facing the filter screen, and a driving component is provided on the diversion pipe for driving the cleaning part close to or away from the filter screen.

[0022] By adopting the above technical solution, the driving component drives the cleaning part to move, so that the electric dredging rod of the cleaning part gradually approaches the filter screen, and the dredging rod is inserted into the mesh of the filter screen to push out the impurities inside the mesh screen, thereby dredging the clogged filter screen so that the filter screen can work again; in addition, the dredging rod pushes the impurities inside the mesh screen to the side of the filter screen close to the scraper plate, so that the scraping component can be used to clean the filter screen.

[0023] Preferably, the driving assembly includes a rotating screw, a guide rod, a waterproof cover, a driving motor and a bevel gear set; the rotating screw and the guide rod are both arranged inside the shunt pipe, the rotating screw is rotatably connected to the shunt pipe, the rotating screw is bolted to the cleaning part, and the guide rod passes through the cleaning part; the waterproof cover is arranged inside the shunt pipe, and one end of the rotating screw passes through the waterproof cover; the driving motor is arranged on the shunt pipe, and the output end of the driving motor is located inside the waterproof cover, and the bevel gear set is arranged at the output end of the driving motor and the end of the rotating screw for transmission connection between the driving motor and the rotating screw.

[0024] By adopting the above technical solution, the waterproof cover reduces the corrosion effect of ballast water on the end of the rotating screw, the output end of the drive motor and the bevel gear group, thereby ensuring the service life of the bevel gear group; the drive motor drives the rotating screw to rotate through the bevel gear group, and the rotating screw drives the cleaning part to move through the thread transmission, thereby driving the cleaning part to move closer to or away from the filter screen.

[0025] Preferably, the cleaning part includes a sliding grid, several groups of guide tubes, several groups of sliding rods, several groups of cleaning plates, several groups of anti-slip blocks and several groups of telescopic parts; one end of the sliding grid is threadedly connected to the rotating screw, and the other end of the sliding grid is connected to the guide rod; the guide tubes, sliding rods, cleaning plates, anti-slip blocks and telescopic parts are arranged in a one-to-one correspondence, all of the guide tubes are passed through the sliding grid, each of the sliding rods is passed through the corresponding guide tubes, each of the cleaning plates is arranged at the end of the corresponding sliding rod facing the filter, and the dredging rod is located on the side wall of each group of cleaning plates facing the filter; each of the anti-slip blocks is arranged at the end of the corresponding sliding rod away from the filter, and each of the telescopic parts is sleeved on the corresponding sliding rod to drive the cleaning plate close to the filter by its own elastic force.

[0026] By adopting the above technical solution, when the rotating screw drives the sliding frame to move toward the filter screen, the dredging rod gradually contacts the filter screen. At this time, the telescopic part is gradually contracted under pressure, which reduces the hard collision between the dredging rod and the filter screen, and reduces the phenomenon of dredging rod breakage; the cleaning part is divided into several groups of cleaning plates so that the ballast water inside the diversion pipe can flow through the gaps between adjacent cleaning plates; in addition, the cleaning part is divided by multiple groups of cleaning plates. When the dredging rod contacts the filter screen at a certain place and the resistance encountered is too large, only a small part of the cleaning plates can be moved in the contracted state of the telescopic part, and the cleaning plates and dredging rods of other parts can maintain the dredging function, and the phenomenon of the cleaning part as a whole being skewed when the dredging rod is obstructed is reduced.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By setting filters with different filtration accuracies to filter the ballast water, multi-stage filtration of the ballast water is achieved, so that impurities of different sizes are retained in different filter screens. While ensuring the filtration accuracy of the conveying mechanism for the ballast water, it also reduces the problem of impurities in the ballast water accumulating in one place, resulting in the need for frequent cleaning of the filter screen, thereby improving the practicality of the filter screen;

[0029] 2. When the filter inside the diverter pipe becomes clogged after being used for a period of time, the switching component can be used to select another diverter pipe of the same filter unit to connect with the delivery pipe, ensuring the continuous operation of the entire delivery mechanism and facilitating the cleaning of the clogged filter, thereby improving the practicality of the filter unit;

[0030] 3. By setting up a cleaning part, a dredging rod and a driving component, the clogged filter screen can be dredged. By setting up a scraping component and a conveying component, the dirt attached to the filter screen can be scraped off; and the cleaning component is used to clean the conveying component, thereby realizing the rapid cleaning of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a multi-stage filtration system of a ballast water treatment system in an embodiment of the present application.

[0032] Figure 2 It is a cross-sectional schematic diagram used to reflect the internal structure of the filter unit in this application.

[0033] Figure 3 It is a structural diagram used to reflect the positional relationship of the diverter pipe, scraping assembly, conveying assembly and cleaning assembly in this application.

[0034] Figure 4 It is a cross-sectional schematic diagram used to reflect the diversion pipe, filter screen and cleaning part in this application.

[0035] Figure 5 It is a cross-sectional schematic diagram used to reflect the diversion pipe, scraping component and conveying component in this application.

[0036] Figure 6 It is a cross-sectional schematic diagram used to illustrate the internal structure of the cleaning component and the diversion tube in this application.

[0037] Description of reference numerals:

[0038] 10. Conveying mechanism; 101. Conveying pipe; 1. Filter unit; 11. Diverter pipe; 12. Filter screen; 13. Switching assembly; 131. Connecting box; 1311. Impact groove; 132. Switching disk; 1321. Switching port; 133. Rotating shaft; 134. Switching motor; 135. Mounting ring; 1351. Mounting groove; 136. Elastic member; 137. Oscillating ball; 2. Scraping assembly; 21. Driving member; 22. Scraping plate; 23. Extension plate; 3. Drain pipe; 31. Valve; 4. Conveying assembly; 41. Separator; 4 2. Conveying plate; 43. Pushing member; 5. Cleaning assembly; 51. Water inlet pipe; 52. Water supply pipe; 53. Pressure pump; 54. Nozzle; 55. Scraper; 56. Limit rod; 57. Adjusting cylinder; 571. Water hole; 58. Rotating motor; 6. Cleaning part; 60. Unclogging rod; 61. Sliding grid; 62. Guide tube; 63. Sliding rod; 64. Cleaning plate; 65. Anti-slip block; 66. Telescopic member; 7. Driving assembly; 71. Rotating screw; 72. Guide rod; 73. Waterproof cover; 74. Driving motor; 75. Bevel gear set. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-6 This application is described in further detail.

[0040] The embodiments of the present application disclose a multi-stage filtration system for a ballast water treatment system.

[0041] Reference Figure 1 and Figure 2 A multi-stage filtration system of a ballast water treatment system includes a conveying mechanism 10 for conveying ballast water. The conveying mechanism 10 includes several groups of filter units 1 and several groups of conveying pipes 101. All filter units 1 and all conveying pipes 101 are connected in sequence at intervals, and each group of filter units 1 is located between two groups of conveying pipes 101.

[0042] Reference Figure 3 and Figure 4Each filter unit 1 includes several groups of manifolds 11, several groups of filter screens 12, and two groups of switching assemblies 13. All manifolds 11 are connected in parallel between adjacent delivery pipes 101. All filter screens 12 are arranged in a one-to-one correspondence with all manifolds 11. Each group of filter screens 12 is fixedly installed within a corresponding manifold 11 to filter the ballast water within the corresponding manifold 11. The mesh size of the filter screens 12 within the same filter unit 1 is consistent, and the mesh size of all filter screens 12 gradually decreases along the flow direction of the ballast water within the delivery mechanism 10, achieving step-by-step filtration of the ballast water.

[0043] Reference Figure 1 and Figure 2 The two sets of switching assemblies 13 are arranged in a one-to-one correspondence with the delivery pipes 101 adjacent to the two ends of the shunt pipe 11, and each set of switching assemblies 13 is connected to the end of the corresponding delivery pipe 101 near the shunt pipe 11. The same end of all the shunt pipes 11 in the longitudinal direction is connected to one set of switching assemblies 13, and the other end of all the shunt pipes 11 is connected to the other set of switching assemblies 13.

[0044] Reference Figure 1 and Figure 2 The switching assembly 13 includes a connecting box 131, a switching disk 132, a rotating shaft 133, a switching motor 134, a mounting ring 135, an elastic member 136, and an oscillating ball 137. In this embodiment, the elastic member 136 can be a spring. The connecting box 131 is installed between the ends of all the shunt tubes 11 in the same filter unit 1 and the adjacent delivery tubes 101. One side of the connecting box 131 is connected to the ends of all the shunt tubes 11 in the same filter unit 1, and the other side of the connecting box 131 is connected to the ends of the adjacent delivery tubes 101.

[0045] Reference Figure 1 and Figure 2 The switching disk 132 is rotatably mounted inside the connecting box 131 and is located on the side of the connecting box 131 away from the delivery pipe 101. A space for liquid flow is reserved between the side wall of the switching disk 132 facing the delivery pipe 101 and the inner wall of the connecting box 131, so that the liquid inside the switching disk 132 can circulate with the interior of the delivery pipe 101. The side wall of the switching disk 132 facing away from the delivery pipe 101 seals the connection between all the branch pipes 11 and the corresponding connecting box 131. The side wall of the switching disk 132 is provided with a switching port 1321. When the switching port 1321 is connected to the pipe opening of one group of branch pipes 11, the interior of this branch pipe 11 can be connected to the interior of the connecting box 131.

[0046] Reference Figure 1 and Figure 2The rotating shaft 133 is fixedly mounted on the switching disk 132, and one end of the rotating shaft 133 passes through the connecting box 131; the switching motor 134 is fixedly connected to the outside of the connecting box 131 through a bracket, and the output end of the switching motor 134 is transmission-connected to the end of the rotating shaft 133 exposed from the connecting box 131, so that the switching motor 134 can drive the rotating shaft 133 to rotate, and the rotating shaft 133 drives the switching disk 132 to rotate.

[0047] Reference Figure 1 and Figure 2 The mounting ring 135 is fixedly sleeved on the end of the rotating shaft 133 exposed from the connecting box 131. The mounting ring 135 defines a mounting groove 1351 on the side wall facing the connecting box 131. The elastic member 136 is adhesively connected to the bottom wall of the mounting groove 1351. The oscillating ball 137 is located within the mounting groove 1351 and adhesively connected to the end of the elastic member 136 facing the connecting box 131. In this embodiment, the elastic member 136 is in a compressed state, so that its own elastic force drives the oscillating ball 137 toward the connecting box 131 and stably contacts the outer wall of the connecting box 131.

[0048] Reference Figure 1 and Figure 2 The side wall of the communication box 131 is provided with a plurality of impact grooves 1311 for the vibration ball 137 to push into. All the impact grooves 1311 correspond to all the diversion pipes 11 one by one, and all the impact grooves 1311 are distributed along the circumference of the rotation axis 133.

[0049] Reference Figure 1 and Figure 2 When the driving motor 74 drives the rotating shaft 133, the mounting ring 135 and the switching disk 132 to rotate, the mounting ring 135 drives the oscillating ball 137 to move, and when the oscillating ball 137 uses the elastic force of the elastic member 136 to press into the impact groove 1311 and make a sound, the switching port 1321 is connected to the shunt pipe 11 corresponding to the impact groove 1311, thereby realizing the switching of different shunt pipes 11 to connect with the inside of the connecting box 131.

[0050] Reference Figure 3 and Figure 4 Each diversion tube 11 is equipped with a cleaning unit 6, with the filter screen 12 and cleaning unit 6 positioned sequentially along the ballast water flow direction within the diversion tube 11. The cleaning unit 6 comprises a sliding grid 61, several sets of guide tubes 62, several sets of sliding rods 63, several sets of cleaning plates 64, several sets of anti-slip blocks 65, and several sets of telescopic members 66. In this embodiment, the telescopic members 66 can be springs. The sliding grid 61 is located within the diversion tube 11 and can move along the length of the diversion tube 11.

[0051] Reference Figure 3 and Figure 4 All guide tubes 62, sliding rods 63, cleaning plates 64, anti-slip blocks 65, and telescopic members 66 are arranged in a one-to-one correspondence. All guide tubes 62 are fixedly inserted into the sliding grid 61. The length direction of all guide tubes 62 is parallel to the sliding direction of the sliding grid 61, and all guide tubes 62 are spaced apart from each other. Each set of sliding guides slides inside the corresponding guide tube 62. Each set of cleaning plates 64 is fixedly connected to the end of the corresponding sliding rod 63 facing the filter 12. Each set of cleaning plates 64 is fixedly connected to the side wall of the filter 12 with several sets of dredging rods 60 for puncturing the mesh of the filter 12.

[0052] Reference Figure 3 and Figure 4 Each set of telescopic members 66 is sleeved onto a corresponding sliding rod 63. One end of the telescopic member 66 abuts against the sliding grid 61, while the other end abuts against the cleaning plate 64. In this embodiment, the telescopic member 66 uses its own elastic force to drive the cleaning plate 64 toward the filter 12. Each set of anti-slip blocks 65 is fixedly connected to the end of the corresponding sliding rod 63 away from the filter 12 to prevent the sliding rod 63 from separating from the corresponding guide tube 62.

[0053] Reference Figure 3 and Figure 4 Each group of shunt pipes 11 is equipped with a drive assembly 7 for driving the cleaning part 6 toward or away from the filter screen 12. The drive assembly 7 includes a rotating screw 71, a guide rod 72, a waterproof cover 73, a drive motor 74 and a bevel gear set 75. The rotating screw 71 is rotatably connected to the inside of the shunt pipe 11, and the guide rod 72 is fixedly connected to the inside of the shunt pipe 11, and the length directions of the rotating screw 71 and the guide rod 72 are parallel to the length direction of the shunt pipe 11. The sliding grid 61 is located between the rotating screw 71 and the guide rod 72. The rotating screw 71 and the guide rod 72 both pass through the sliding grid 61, and the rotating screw 71 is threadedly connected to the sliding grid 61.

[0054] Reference Figure 3 and Figure 4 The waterproof cover 73 is fixedly connected to the inside of the shunt pipe 11, and one end of the rotating screw 71 in the longitudinal direction thereof passes through the waterproof cover 73. The drive motor 74 is fixedly mounted on the shunt pipe 11, and the output end of the drive motor 74 passes through the shunt pipe 11 and is located inside the waterproof cover 73. The bevel gear set 75 is fixedly connected to the output end of the drive motor 74 and the end of the rotating screw 71 located inside the waterproof cover 73. The bevel gear set 75 provides a transmission connection between the output end of the drive motor 74 and the rotating screw 71, thereby enabling the drive motor 74 to drive the rotating screw 71 to rotate.

[0055] Reference Figure 3 and Figure 4 , each group of shunt pipes 11 is equipped with a scraping assembly 2 for scraping dirt off the filter plate. The scraping assembly 2 includes a driving member 21, a scraping plate 22, and an extension plate 23. In this embodiment, the driving member 21 can be a driving cylinder. The driving member 21 is fixedly mounted on the shunt pipe 11, and the output end of the driving member 21 passes through the shunt pipe 11. The scraping plate 22 is located inside the shunt pipe 11. The scraping plate 22 is fixedly connected to the output end of the driving member 21, and the side wall of the scraping plate 22 abuts against the side wall of the filter screen 12 away from the cleaning portion 6. The extension plate 23 is integrally formed on the side wall of the scraping plate 22 away from the filter screen 12, and the extension plate 23 is located on the side of the scraping plate 22 away from the driving member 21.

[0056] Reference Figure 3 and Figure 4 Each group of manifolds 11 is fixedly connected to a drain pipe 3, and a valve 31 is installed on the drain pipe 3 to control the opening and closing of the end of the drain pipe 3 away from the manifold 11. A conveying assembly 4 is installed on each group of manifolds 11 to convey dirt on the scraper plate 22 and extension plate 23 into the drain pipe 3.

[0057] Reference Figure 4 and Figure 5 The conveying assembly 4 includes a partition plate 41, a conveying plate 42 and a pusher 43. In this embodiment, the pusher 43 is a push cylinder. The pusher 43 is fixedly mounted on the side wall of the diverter pipe 11 away from the sewage pipe 3, and the output end of the pusher 43 passes through the side wall of the diverter pipe 11. The conveying plate 42 is located inside the diverter pipe 11. The conveying plate 42 is fixedly connected to the output end of the pusher 43, and a passage is provided through the connection between the diverter pipe 11 and the sewage pipe 3 for the conveying plate 42 to pass through. The side walls of the extension plate 23 and the filter screen 12 facing each other can both abut against the side walls of the conveying plate 42, and the side walls of the conveying plate 42 can abut against the side walls of the scraper plate 22 away from the driving member 21.

[0058] Reference Figure 4 and Figure 5 The partition plate 41 is fixedly connected to the inner side wall of the diversion pipe 11. The partition plate 41 is located on the side of the filter screen 12 facing the extension plate 23. The side wall of the partition plate 41 facing the filter screen 12 is coplanar with the side wall of the extension plate 23 facing the filter screen 12; and when the extension plate 23 and the partition plate 41 are against each other, the scraping plate 22, the extension plate 23, the partition plate 41, the filter screen 12 and the inner side wall of the diversion pipe 11 can form a channel for the conveying plate 42 to move.

[0059] Reference Figure 3 、 Figure 5 and Figure 6A cleaning assembly 5 is installed inside the sewage pipe 3. The cleaning assembly 5 includes two sets of water inlet pipes 51, a water supply pipe 52, a pressure pump 53, a plurality of nozzles 54, a scraper 55, a limit rod 56, an adjustment cylinder 57, and a rotating motor 58. The two sets of water inlet pipes 51 are fixedly connected to the outer wall of the sewage pipe 3, with one set of water inlet pipes 51 located on one side of the sewage pipe 3 in the width direction, and the other set of water inlet pipes 51 located on the other side of the sewage pipe 3. All nozzles 54 are fixedly connected to the side walls of the two sets of water inlet pipes 51 facing each other. Each set of nozzles 54 penetrates the sewage pipe 3 and faces the side wall of the conveying plate 42 away from the pusher 43.

[0060] Reference Figure 3 and Figure 6 A water supply pipe 52 is installed between the two sets of water inlet pipes 51 and is connected to an external water source to provide clean water to the two sets of water inlet pipes 51. A pressure pump 53 is installed on the water supply pipe 52 to increase the pressure of the liquid flowing into the water inlet pipes 51 through the water supply pipe 52, so that the high-pressure water in the water inlet pipe 51 can clean the dirt on the conveying plate 42 inside the sewage pipe 3 through the nozzle 54.

[0061] Reference Figure 5 and Figure 6 The limiting rod 56 is fixedly connected to the interior of the sewage pipe 3, and the scraper 55 is sleeved on the limiting rod 56 so that the scraper 55 can slide along the length of the limiting rod 56 and abut against the side wall of the conveying plate 42 away from the pusher 43. The sliding direction of the scraper 55 intersects with the output direction of the nozzle 54, so that the high-pressure water sprayed by the nozzle 54 can drive the scraper 55 to move.

[0062] Reference Figure 3 and Figure 6 The regulating cylinder 57 is rotatably mounted at the connection point between the water supply pipe 52 and the two sets of water inlet pipes 51. In this embodiment, the end of the regulating cylinder 57 facing the booster pump is open, so that the interior of the regulating cylinder 57 is connected to the interior of the water supply pipe 52. A rotary motor 58 is fixedly mounted on the water supply pipe 52, and the output end of the rotary motor 58 is fixedly connected to the regulating cylinder 57, which is used to drive the regulating cylinder 57 to rotate within the water supply pipe 52.

[0063] Reference Figure 3 and Figure 6 Two groups of water holes 571 are opened through the peripheral wall of the regulating cylinder 57. The two groups of water holes 571 are relatively distributed around the central axis of the regulating cylinder 57, and the inner diameters of the relative water holes 571 are different, so as to connect two groups of different water inlet pipes 51, thereby achieving different water pressure differences inside the two groups of water inlet pipes 51.

[0064] The implementation principle of the multi-stage filtration system of the ballast water treatment system in the embodiment of the present application is as follows:

[0065] When the ballast water needs to be filtered, the switching component 13 is used to connect one of the groups of diversion pipes 11 inside the filter unit 1 with the delivery pipe 101, so that the ballast water flows along the length direction of the delivery mechanism 10; during the flow of the ballast water, it passes through multiple groups of filter screens 12 with different filtration precisions, thereby achieving multi-stage filtration of the ballast water and ensuring the filtering effect of the ballast water; impurities of different volume sizes are retained in different filter screens 12, reducing the accumulation of a large amount of impurities in one place, thereby reducing the phenomenon that the filter screen 12 is easily blocked and needs frequent cleaning, thereby improving the practicality of the filter screen 12.

[0066] When too many impurities accumulate in the filter screen 12 inside a certain diversion pipe 11 and need to be cleaned, the switching motor 134 is started to drive the rotating shaft 133 and the switching disk 132 to rotate, so that the switching port 1321 is connected to another group of diversion pipes 11, thereby switching the other group of diversion pipes 11 to be connected to the conveying pipe 101, ensuring the continuous operation of the overall conveying mechanism 10, and also facilitating the cleaning of the clogged filter screen 12, thereby improving the practicality of the filter unit 1.

[0067] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A multi-stage filtration system for a ballast water treatment system, characterized by: The invention comprises a conveying mechanism (10) for conveying ballast water, wherein the conveying mechanism (10) comprises a plurality of conveying pipes (101) and filter units (1) sequentially connected to the conveying pipes (101) at intervals; each filter unit (1) comprises a plurality of diverter pipes (11), a filter screen (12) arranged inside each diverter pipe (11), and two sets of switching components (13); all the diverter pipes (11) are arranged in parallel between adjacent conveying pipes (101), and one end of each diverter pipe (11) in the longitudinal direction is connected to one of the switching components (13). The switching components (13) are connected, the other ends of all the diverter pipes (11) are connected to another set of switching components (13), the two switching components (13) are arranged in a one-to-one correspondence with the two sets of delivery pipes (101) adjacent to the diverter pipes (11), and each switching component (13) is connected to the corresponding delivery pipe (101), the switching component (13) is used to switch the diverter pipe (11) connected to the delivery pipe (101), and the mesh sizes of all the filter screens (12) decrease in sequence along the flow direction of the ballast water inside the delivery mechanism (10); Each of the diverter pipes (11) is provided with a scraping assembly (2) for scraping dirt off the filter plate, each of the diverter pipes (11) is connected to a drain pipe (3), the drain pipe (3) is connected to a valve (31), each of the diverter pipes (11) is provided with a conveying assembly (4) for conveying dirt to the inside of the drain pipe (3), and a cleaning assembly (5) for cleaning the conveying assembly (4) is provided inside the drain pipe (3); The cleaning assembly (5) comprises two groups of water inlet pipes (51), a water supply pipe (52), a pressure pump (53) and a plurality of groups of nozzles (54); the two water inlet pipes (51) are both arranged on the outer side wall of the sewage pipe (3), and the sewage pipe (3) is located between the two groups of water inlet pipes (51); the water supply pipe (52) is arranged between the two groups of water inlet pipes (51) to supply water to the two groups of water inlet pipes (51); the pressure pump (53) is arranged on the water supply pipe (52); all the nozzles (54) are arranged on the side wall of each group of water inlet pipes (51) facing the sewage pipe (3), and each nozzle (54) penetrates the sewage pipe (3); The cleaning assembly (5) further comprises a scraper (55), a limiting rod (56), an adjusting cylinder (57) and a rotating motor (58); the scraper (55) is slidably arranged inside the sewage pipe (3), the limiting rod (56) is arranged inside the sewage pipe (3), the limiting rod (56) passes through the scraper (55), and the output direction of the nozzle (54) and the sliding direction of the scraper (55) intersect with each other; the adjusting cylinder (57) is rotatably arranged at the connection point between the water supply pipe (52) and the two groups of water inlet pipes (51), and the rotating motor (58) is arranged on the water supply pipe (52) to drive the adjusting cylinder (57) to rotate; the interior of the adjusting cylinder (57) is connected to the interior of the water supply pipe (52), and water holes (571) for connecting to different water inlet pipes (51) are relatively penetrated on both sides of the width direction of the adjusting cylinder (57), and the inner diameters of the relative water holes (571) are different.

2. The multi-stage filtration system of a ballast water treatment system according to claim 1, characterized in that: The switching assembly (13) comprises a connecting box (131), a switching disk (132), a rotating shaft (133), a switching motor (134), a mounting ring (135), an elastic member (136) and an oscillating ball (137); the connecting box (131) is connected and arranged between all the shunt pipes (11) and the corresponding delivery pipes (101); the switching disk (132) is rotatably arranged inside the connecting box (131) to seal the connection between all the shunt pipes (11) and the connecting box (131); a space for liquid circulation is reserved between the switching disk (132) and the delivery pipe (101); and a switching port (1321) for connecting the shunt pipes (11) and the delivery pipe (101) is provided on the switching disk (132); the rotating shaft (133) is arranged on the switching disk (132), and the rotating shaft (133) One end of the connecting box (131) passes through the connecting box (131), and the switching motor (134) is arranged on the connecting box (131) to drive the rotating shaft (133) to rotate; the mounting ring (135) is sleeved on the rotating shaft (133), and the side wall of the mounting ring (135) is provided with a mounting groove (1351), the oscillating ball (137) is slidably arranged inside the mounting groove (1351), and the elastic member (136) is arranged inside the mounting groove (1351) to drive the oscillating ball (137) to disengage from the mounting groove (1351); the side wall of the connecting box (131) is provided with a plurality of groups of impact grooves (1311) for the oscillating ball (137) to be pressed into, and all the impact grooves (1311) are distributed along the circumference of the rotating shaft (133), and the impact grooves (1311) and the shunt pipe (11) are arranged in a one-to-one correspondence.

3. The multi-stage filtration system of a ballast water treatment system according to claim 1, characterized in that: The scraping assembly (2) comprises a driving member (21), a scraping plate (22) and an extension plate (23); the scraping plate (22) is slidably arranged inside the diversion pipe (11) along the height direction of the filter screen (12); the scraping plate (22) and the filter screen (12) are sequentially distributed along the flow direction of the ballast water, and the side walls of the scraping plate (22) are against the filter screen (12); the driving member (21) is arranged on the diversion pipe (11) to drive the scraping plate (22) to move; the extension plate (23) is arranged at one end of the scraping plate (22) away from the filter screen (12), and the extension plate (23) is located on the side of the scraping plate (22) facing the conveying assembly (4).

4. The multi-stage filtration system of a ballast water treatment system according to claim 1, characterized in that: The conveying assembly (4) comprises a partition plate (41), a conveying plate (42) and a pushing member (43); the partition plate (41) is arranged on the inner side wall of the diversion pipe (11), and the partition plate (41) is located on the side of the filter screen (12) facing the scraping plate (22); the scraping plate (22) is located between the partition plate (41) and the filter screen (12), and the length direction of the partition plate (41) is parallel to the length direction of the scraping plate (22); the conveying assembly (4) comprises a partition plate (41), a conveying plate (42) and a pushing member (43); the partition plate (41) is arranged on the inner side wall of the diversion pipe (11), and the partition plate (41) is located on the side of the filter screen (12) facing the scraping plate (22); the scraping plate (22) is located between the partition plate (41) and the filter screen (12), and the length direction of the partition plate (41) is parallel to the length direction of the scraping plate (22); The plate (42) is slidably arranged inside the diverter pipe (11) along the length direction of the partition plate (41), and the conveying plate (42) can abut against the filter screen (12), the partition plate (41), the scraper plate (22) and the extension plate (23). A passage for the conveying plate (42) to pass through is provided at the connection point between the diverter pipe (11) and the sewage pipe (3); the pushing member (43) is arranged on the diverter pipe (11) to drive the conveying plate (42) to slide.

5. The multi-stage filtration system of a ballast water treatment system according to claim 1, characterized in that: Each of the diverter pipes (11) is provided with a cleaning portion (6) which is slidably arranged along the length direction of the diverter pipe (11); the filter screen (12) and the cleaning portion (6) are sequentially distributed along the flow direction of the ballast water; a dredging rod (60) for dredging the filter screen (12) is provided on the side wall of the cleaning portion (6) facing the filter screen (12); and a driving assembly (7) for driving the cleaning portion (6) to approach or move away from the filter screen (12) is provided on the diverter pipe (11).

6. The multi-stage filtration system of a ballast water treatment system according to claim 5, characterized in that: The driving assembly (7) comprises a rotating screw (71), a guide rod (72), a waterproof cover (73), a driving motor (74) and a bevel gear set (75); the rotating screw (71) and the guide rod (72) are both arranged inside the shunt pipe (11), the rotating screw (71) is rotatably connected to the shunt pipe (11), the rotating screw (71) is bolted to the cleaning part (6), and the guide rod (72) passes through the cleaning part (6); the waterproof cover (73) is arranged inside the shunt pipe (11), and one end of the rotating screw (71) passes through the waterproof cover (73); the driving motor (74) is arranged on the shunt pipe (11), the output end of the driving motor (74) is located inside the waterproof cover (73), and the bevel gear set (75) is arranged at the output end of the driving motor (74) and the end of the rotating screw (71) for transmission connection between the driving motor (74) and the rotating screw (71).

7. The multi-stage filtration system of a ballast water treatment system according to claim 6, characterized in that: The cleaning part (6) comprises a sliding grid (61), a plurality of guide tubes (62), a plurality of sliding rods (63), a plurality of cleaning plates (64), a plurality of anti-slip blocks (65) and a plurality of telescopic members (66); one end of the sliding grid (61) is threadedly connected to the rotating screw (71), and the other end of the sliding grid (61) is connected to the guide rod (72); the guide tubes (62), the sliding rods (63), the cleaning plates (64), the anti-slip blocks (65) and the telescopic members (66) are arranged in a one-to-one correspondence, and all the guide tubes (62) are inserted into the sliding grid (61). ), each of the sliding rods (63) is passed through the inside of the corresponding guide tube (62), each of the cleaning plates (64) is arranged at the end of the corresponding sliding rod (63) facing the filter (12), and the dredging rod (60) is located on the side wall of each group of cleaning plates (64) facing the filter (12); each of the anti-falling blocks (65) is arranged at the end of the corresponding sliding rod (63) away from the filter (12), and each of the telescopic parts (66) is sleeved on the corresponding sliding rod (63) to drive the cleaning plate (64) close to the filter (12) by its own elastic force.

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