Multi-stage filtering equipment for pure water treatment

Abstract

The invention discloses multi-stage filtering equipment for pure water treatment, and relates to the technical field of pure water preparation, the multi-stage filtering equipment comprises a filtering component and a reverse osmosis purifying component, the filtering component comprises a filtering tank, a plurality of filtering net cylinders are arranged in a filtering cavity in a circumferential array mode, and one end of each filtering net cylinder is communicated with a communicating pipe; fixing pipes are fixedly arranged at the coaxial positions of the filter screen cylinders, a cleaning mechanism is arranged in the water inlet cavity, and a sealing mechanism is arranged in a water outlet in one side of each fixing pipe. By arranging a plurality of filter screen cylinders, raw water can be subjected to multi-stage filtration, continuous filtration of the raw water is facilitated by arranging the four filter screen cylinders, discharge of the raw water in the filter cavity can be reduced by arranging a fixed pipe and symmetrically and rotationally arranging rotating baffles in a water outlet, and meanwhile, by arranging a scraping rod, the scraping rod is prevented from being scraped by the scraping rod. And the inner wall of the filter screen cylinder can be comprehensively cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of pure water preparation, in particular to a multi-stage filtering device for pure water treatment. Background Art

[0002] Pure water treatment technology has important applications in the fields of electronics, pharmaceutical manufacturing, laboratory analysis and food processing. Its core goal is to obtain high-purity water by removing impurities such as ions, microorganisms, particulate matter and organic matter in water. Traditional multi-stage filtration equipment usually adopts a combination of pretreatment, reverse osmosis, ion exchange resin and post-stage fine filtration. The pretreatment filtration process is an important part of pure water preparation. Otherwise, impurities in the water can easily cause the reverse osmosis membrane to be blocked and fail. The existing filtration device will be blocked by impurities after a period of use, resulting in poor water flow and affecting the filtration effect. If the filter components need to be cleaned, the filtration device needs to stop running, which will cause the production of pure water to stop, resulting in the inability to carry out continuous preparation and processing.

[0003] The authorization announcement number is: CN117942656B, which discloses a multi-stage filtration pure water preparation device and its use method. The pure water preparation device is linked with the multi-layer filter cylinder through the cover body to achieve continuous filtration and backwashing synchronous operation. When the rotating cover body closes the water hole of the filter cylinder to be cleaned, the other filter cylinders operate normally; after the backwash is started, the cover body moves to trigger the activation of the spare filter cylinder to ensure the stability of the number of filter units.

[0004] However, when the above-mentioned preparation equipment cleans the filter screen cylinder, since the filter screen cylinder is open, irregular backwashing will be performed during backwashing and drainage, resulting in some areas being backwashed and cleaned while the rest of the area is not cleaned, and more liquid needs to be discharged in this process, which will cause the pressure at the water outlet to drop significantly. When draining water, liquid is discharged from both the rotating tube and the water outlet pipe, and the water is diverted into two parts. At this time, backwashing and cleaning will be performed without the bottom of the remaining filter screen cylinder being closed. Only one cover body is provided in the above-mentioned preparation equipment. Therefore, impurities will enter the lower chamber and cannot be discharged and cleaned every time cleaning is performed.

[0005] Based on this, a multi-stage filtration device for pure water treatment is now provided, which can eliminate the disadvantages of the existing devices. Summary of the invention

[0006] The object of the present invention is to provide a multi-stage filtering device for pure water treatment to solve the problem in the background art that it is inconvenient to clean the filter cylinder uniformly.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A multi-stage filtration device for pure water treatment, comprising a filtration component and a reverse osmosis purification component. The filtration component includes a filtration tank, and a first partition plate and a second partition plate are fixedly arranged inside the filtration tank. A filtration chamber is formed between the upper end of the first partition plate and the upper end inside the filtration tank, and a water inlet chamber is formed between the bottom end of the first partition plate and the upper end of the second partition plate. A plurality of filter mesh cylinders are arranged in a circumferential array inside the filtration chamber. One end of each filter mesh cylinder is communicated with a connecting pipe, and the connecting pipe is fixedly arranged in the mounting hole at the upper end of the first partition plate. Fixed pipes are fixedly arranged at the coaxial positions of the filtration chamber and the filter mesh cylinders, and drain ports are arranged on each fixed pipe. A cleaning mechanism for cleaning impurities inside a plurality of filter mesh cylinders is arranged inside the water inlet chamber, and a closing mechanism for closing the inside of the fixed pipe is arranged inside the drain port on one side of the fixed pipe.

[0009] On the basis of the above technical solution, the present invention also provides the following optional technical solutions:

[0010] In an optional solution: a water outlet pipe and a water inlet pipe are respectively communicated at the positions corresponding to the filtration chamber and the water inlet chamber on the filtration tank. A plurality of the filtration components are fixedly arranged at the upper end of the mounting table, and a plurality of the filtration components are communicated with each other through a first connecting pipe. The end of the water outlet pipe of one filtration component is communicated with a third connecting pipe, and the other end of the third connecting pipe is communicated with the input end of the reverse osmosis purification component.

[0011] In an optional solution: the cleaning mechanism includes a scraping rod and a connecting cover. The scraping rods are closely attached to the inner walls of the filter mesh cylinders. A plurality of connecting rods are fixedly arranged on one side of each scraping rod, and the other ends of the connecting rods are fixedly arranged on a first rotating shaft. One end of the first rotating shaft is rotatably arranged at the upper end inside the filter mesh cylinder, and a support frame is rotatably arranged at the other end of the first rotating shaft. The support frame is fixedly arranged inside the connecting pipe. A transmission pipe is communicated on the connecting cover, and the other end of the transmission pipe is communicated with a sliding pipe. One end of the sliding pipe is slidably sleeved with a rotating pipe, and one end of the rotating pipe extends outside the filtration tank. One end of the rotating pipe is rotatably communicated with a second sewage discharge pipe, and a driven gear is fixedly arranged at one end of the rotating pipe. A driving gear is meshed with the driven gear, and the driving gear is fixedly arranged at the output end of a first motor. The first motor is fixedly arranged at the bottom end of the filtration tank. The connecting cover is slidably sleeved and matched with one end of the connecting pipe, and a driving component for driving the first rotating shaft to rotate is arranged inside the connecting cover and the sliding pipe.

[0012] In an alternative solution: The driving assembly includes a friction cam wheel. A friction cam is frictionally fitted inside the friction cam wheel. One end of the first rotating shaft is fixedly provided with a friction cam. The friction cam wheel is fixedly arranged at one end of a fixed shaft. The fixed shaft is rotatably arranged in the mounting hole at the upper end of the fixed box. A first bevel gear is fixedly provided at the other end of the fixed shaft. A second bevel gear is meshed with the first bevel gear. The second bevel gear is fixedly arranged at one end of a transmission shaft. The transmission shaft is rotatably arranged in the mounting hole on one side of the fixed box. A third bevel gear is fixedly provided at the other end of the transmission shaft. A fourth bevel gear is meshed with the third bevel gear. The fourth bevel gear is fixedly arranged at one end of a second rotating shaft. The other end of the second rotating shaft extends outside the filter tank. A sealing inclined plate is rotatably arranged on the transmission shaft. The sealing inclined plate is fixedly arranged inside a sliding tube. The fixed box is fixedly arranged at the bottom end inside the connecting cover. A sliding push rod is rotatably arranged outside the second rotating shaft. One end of the sliding push rod is rotatably arranged at the upper end of the sliding tube. One end of the sliding push rod extends outside the filter tank. An external spline shaft is fixedly provided at the other end of the second rotating shaft. An internal spline shaft is fitted with the external spline shaft. The internal spline shaft is fixedly arranged at the output end of a second motor. The second motor is fixedly arranged at the upper end inside the fixed frame. The fixed frame is fixedly arranged at the upper end of the filter tank. A connecting plate is fixedly provided at the other end of the sliding push rod. Both ends of the connecting plate are fixedly connected to the output ends of two electric cylinders. The electric cylinders are both fixedly arranged at the upper end inside the fixed frame.

[0013] In an alternative solution: A second valve is communicated at one end of the second sewage discharge pipe. A first sewage discharge pipe is communicated with the water inlet cavity on the filter tank. A second connecting pipe is communicated at one end of each of the first sewage discharge pipes. A first valve is communicated at one end of the second connecting pipe. One ends of the second connecting pipe and the second sewage discharge pipe are both communicated with the input end of an external liquid pumping component.

[0014] In an alternative solution: The closing mechanism includes a rotating baffle. Rotating baffles are symmetrically arranged inside the drain openings. The rotating shafts at both ends of the rotating baffle are rotatably arranged in the mounting holes inside the drain openings. The rotating shafts at one end of the rotating baffle all extend into the water inlet cavity. Fixed columns are arranged on the rotating shafts at one end of the rotating baffle. Spiral grooves are arranged on the fixed columns. Guide columns are slidably arranged inside the spiral grooves. The guide columns are fixedly arranged inside a sleeve pipe. The sleeve pipe is sleeved at one end of the fixed column. An extension plate is fixedly provided at one end of the sleeve pipe. Guide sliding rods are slidably arranged on the extension plates. The guide sliding rods are fixedly arranged at the bottom end of the first partition plate. A connecting plate is fixedly provided between two same-side sleeve pipes. A top rod is fixedly arranged at the position corresponding to the connecting plate on the outside of the connecting cover. Anti-flushing discs are fixedly arranged at the upper end inside the filter mesh cylinder. A filter screen is arranged at the bottom end of the anti-flushing disc. A return pipe is communicated inside each of the anti-flushing discs. One end of the return pipe extends outside the fixed pipe.

[0015] In an alternative solution: a cleaning rod is tightly attached to the bottom end of the filter net, and the cleaning rod is fixedly arranged at one end of the scraping rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. By arranging a plurality of filter net cylinders, the present invention can perform multi-stage filtration on raw water. And by arranging a first partition board and a second partition board inside the filter tank, it is convenient to divide the inside of the filter tank into a water inlet chamber and a filtration chamber. By arranging four filter net cylinders inside the filtration chamber, and when performing the filtration work, a connecting cover closes one end of one of the filter net cylinders. Then, when the other filter net cylinders are blocked, the connecting cover can be switched and rotated, and the unused filter net cylinder can work to ensure continuous filtration of the raw water.

[0018] 2. By arranging fixed pipes on the outer sides of the filter net cylinders and symmetrically and rotatably arranging rotating baffle plates inside the drain ports, when cleaning the impurities attached to the inside of the filter net cylinders, the inside of the fixed pipes is closed. When discharging sewage, the discharge of the raw water inside the filtration chamber can be reduced. At the same time, by arranging a scraping rod, the inner wall of the filter net cylinder can be comprehensively cleaned. And by arranging a backwashing disc at the upper end inside the filter net cylinder, when discharging sewage, the raw water inside the filtration chamber can replace the raw water inside the fixed pipes, and at the same time, it can also push the impurities out, thereby increasing the practicability of the multi-stage pure water filtration equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the filter tank of the present invention.

[0021] Figure 3 It is an installation schematic diagram of the first partition board and the second partition board of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the filter net cylinder of the present invention.

[0023] Figure 5 It is an installation schematic diagram of the connecting cover and the sliding pipe of the present invention.

[0024] Figure 6 It is a structural schematic diagram of the fixed column of the present invention.

[0025] Figure 7 It is a structural schematic diagram of the backwashing disc of the present invention.

[0026] Figure 8 It is an installation schematic diagram of the rotating baffle plate of the present invention.

[0027] Annotation of reference numerals: 11 filtering component, 12 reverse osmosis purification component, 13 first connecting pipe, 14 second connecting pipe, 15 first valve, 16 second valve, 17 filtering tank, 18 first partition plate, 19 second partition plate, 20 water inlet pipe, 21 water outlet pipe, 22 first sewage discharge pipe, 23 filter mesh cylinder, 24 fixing pipe, 25 rotating baffle, 26 scraping rod, 27 first rotating shaft, 28 connecting cover, 29 sliding pipe, 30 rotating pipe, 31 second sewage discharge pipe, 32 driven gear, 33 first motor, 34 friction cam, 35 friction concave cam, 36 transmission shaft, 37 second rotating shaft, 38 internal spline shaft, 39 second motor, 40 sliding push rod, 41 electric cylinder, 42 fixing column, 43 spiral groove, 44 guiding column, 45 sleeve pipe, 46 ejector rod, 47 backwashing disc, 48 return pipe. Detailed implementation manners

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] In one embodiment, as Figures 1 - 8 shown, a multi-stage filtering device for pure water treatment includes a filtering component 11 and a reverse osmosis purification component 12. The filtering component 11 includes a filtering tank 17. A first partition plate 18 and a second partition plate 19 are fixedly arranged inside the filtering tank 17. A filtering cavity is formed between the upper end of the first partition plate 18 and the upper end inside the filtering tank 17. A water inlet cavity is formed between the bottom end of the first partition plate 18 and the upper end of the second partition plate 19. A water outlet pipe 21 and a water inlet pipe 20 are respectively communicated with the filtering tank 17 at positions corresponding to the filtering cavity and the water inlet cavity. A plurality of filter mesh cylinders 23 are arranged in a circumferential array inside the filtering cavity. One end of each filter mesh cylinder 23 is communicated with a connecting pipe. The connecting pipe is fixedly arranged in an installation hole at the upper end of the first partition plate 18. Fixing pipes 24 are fixedly arranged coaxially with the filter mesh cylinders 23 inside the filtering cavity. Drainage openings are arranged on each fixing pipe 24. A cleaning mechanism for cleaning impurities inside a plurality of filter mesh cylinders 23 is arranged inside the water inlet cavity. A closing mechanism for closing the inside of the fixing pipe 24 is arranged in a drainage opening on one side of the fixing pipe 24. The cleaning mechanism facilitates the cleaning and discharging of impurities filtered out inside a plurality of filter mesh cylinders 23, and the closing mechanism can close the inside of the fixing pipe 24;

[0030] A plurality of the filtering components 11 are fixedly arranged at the upper end of the mounting table. The plurality of the filtering components 11 are communicated with each other through a first connecting pipe 13. A third connecting pipe is communicated with the end of the water outlet pipe 21 on one of the filtering components 11. The other end of the third connecting pipe is communicated with the input end of the reverse osmosis purification component 12. When in use, during the production and filtration of pure water, the water inlet pipe 20 on the outermost filtering component 11 is communicated with the output end of the external liquid supply component. Then, the raw water enters the water inlet cavity. Subsequently, the raw water passes through the filter mesh cylinder 23 and enters the filtering cavity. The raw water filtered by the filter mesh cylinder 23 is discharged through the water outlet pipe 21 and enters the interior of the next filtering component 11 through the first connecting pipe 13 for multi-stage filtration. After the raw water is filtered by the last filtering component 11, it enters the reverse osmosis purification component 12 for reverse osmosis purification. It should be noted that the reverse osmosis purification component 12 in this application adopts an existing component, and its specific structure and working principle are well-known and will not be elaborated here.

[0031] The cleaning mechanism includes a scraping rod 26 and a connecting cover 28. The scraping rods 26 are tightly attached to the inner walls of the filter mesh cylinders 23. A plurality of connecting rods are fixedly arranged on one side of each scraping rod 26. The other ends of the connecting rods are fixedly arranged on a first rotating shaft 27. One end of the first rotating shaft 27 is rotatably arranged at the upper end inside the filter mesh cylinder 23. The other ends of the first rotating shafts 27 are rotatably provided with support frames. The support frames are fixedly arranged inside the communicating pipe. A transmission pipe is communicated with the connecting cover 28. The other end of the transmission pipe is communicated with a sliding pipe 29. One end of the sliding pipe 29 is slidably sleeved with a rotating pipe 30. One end of the rotating pipe 30 extends to the outside of the filter tank 17. One end of the rotating pipe 30 is rotatably communicated with a second sewage discharge pipe 31. One end of the rotating pipe 30 is fixedly provided with a driven gear 32. A driving gear is meshed with the driven gear 32. The driving gear is fixedly arranged on the output end of a first motor 33. The first motor 33 is fixedly arranged at the bottom end of the filter tank 17. The connecting cover 28 is slidably sleeved and matched with one end of the communicating pipe. A driving assembly for driving the first rotating shaft 27 to rotate is arranged inside the connecting cover 28 and the sliding pipe 29.

[0032] The driving assembly includes a friction cam wheel 35, inside which a friction cam 34 is frictionally engaged. One end of the first rotating shaft 27 is fixedly provided with a friction cam 34. The friction cam wheel 35 is fixedly arranged at one end of a fixed shaft, and the fixed shaft is rotatably arranged in the mounting hole at the upper end of the fixed box. The other end of the fixed shaft is fixedly provided with a first bevel gear, which meshes with a second bevel gear. The second bevel gear is fixedly arranged at one end of a transmission shaft 36. The transmission shaft 36 is rotatably arranged in the mounting hole on one side of the fixed box. The other end of the transmission shaft 36 is fixedly provided with a third bevel gear, which meshes with a fourth bevel gear. The fourth bevel gear is fixedly arranged at one end of a second rotating shaft 37. The other end of the second rotating shaft 37 extends outside the filter tank 17. A sealing inclined plate is rotatably arranged on the transmission shaft 36, and the sealing inclined plate is fixedly arranged inside the sliding tube 29. The fixed box is fixedly arranged at the inner bottom end of the connecting cover 28. A sliding push rod 40 is rotatably arranged outside the second rotating shaft 37. One end of the sliding push rod 40 is rotatably arranged at the upper end of the sliding tube 29, and one end of the sliding push rod 40 extends outside the filter tank 17. The other end of the second rotating shaft 37 is fixedly provided with an external spline shaft, and an internal spline shaft 38 is arranged in cooperation with the external spline shaft. The internal spline shaft 38 is fixedly arranged at the output end of a second motor 39. The second motor 39 is fixedly arranged at the upper end inside the fixed frame. The fixed frame is fixedly arranged at the upper end of the filter tank 17. The other end of the sliding push rod 40 is fixedly provided with a connecting plate, and both ends of the connecting plate are fixedly connected to the output ends of two electric cylinders 41. The electric cylinders 41 are both fixedly arranged at the upper end inside the fixed frame. During use, raw water enters the interior of the water inlet cavity through the water inlet pipe 20, and then the raw water enters the interior of the filter screen cylinder 23 through the communicating pipe. After the raw water is filtered by the filter screen cylinder 23, it is discharged into the filter cavity through the drain opening on the fixed pipe 24, and then discharged through the water outlet pipe 21. When an external detection component detects that the pressure at the end of the water outlet pipe 21 decreases, the external control component starts the electric cylinders 41. The output ends of the electric cylinders 41 drive the sliding push rod 40 to slide, and the sliding push rod 40 drives the sliding tube 29 and the connecting cover 28 to slide, so that the connecting cover 28 disengages from the end of one communicating pipe. At this time, the filter screen cylinder 23 coaxial with the connecting cover 28 is in the state of being unused after cleaning. Subsequently, the external control component controls the first motor 33 to start. The first motor 33 drives the rotating tube 30 to rotate. The rotating tube 30 drives the connecting cover 28 to rotate 90 degrees through the sliding tube 29, so that the connecting cover 28 is located below the other communicating pipe and is coaxial with the communicating pipe. Subsequently, the output ends of the electric cylinders 41 contract, and the sliding push rod 40 drives the sliding tube 29 and the connecting cover 28 to rise, so that the connecting cover 28 is sleeved with the communicating pipe. At the same time, the friction cam wheel 35 is in close contact with the friction cam 34. Subsequently, the second motor 39 is started. The second motor 39 drives the transmission shaft 36 to rotate through the second rotating shaft 37. The transmission shaft 36 drives the friction cam wheel 35 to rotate. The friction cam wheel 35 and the friction cam 34 are frictionally driven, thereby driving the first rotating shaft 27 to rotate.The first rotating shaft 27 drives the scraping rod 26 to rotate. Since the scraping rod 26 is in close contact with the inner wall of the filter screen cylinder 23, the scraping rod 26 scrapes off the impurities attached to the inner wall of the filter screen cylinder 23, thereby cleaning the inner wall of the filter screen cylinder 23.

[0033] One end of the second sewage discharge pipe 31 is communicated with a second valve 16. A first sewage discharge pipe 22 is communicated with the filter tank 17 at the water inlet chamber. One end of the first sewage discharge pipe 22 is communicated with a second connecting pipe 14. One end of the second connecting pipe 14 is communicated with a first valve 15. One ends of the second connecting pipe 14 and the second sewage discharge pipe 31 are both communicated with the input end of an external liquid extraction component. During use, when it is necessary to discharge the impurities inside the water inlet chamber, the first valve 15 is opened, and the external liquid extraction component works to extract the raw water inside the water inlet chamber. Since the second partition plate 19 is inclined, it is convenient for the impurities to be discharged. When it is necessary to discharge the impurities cleaned inside the filter screen cylinder 23, the second valve 16 is opened, and the external liquid extraction component works, so that the raw water inside the fixed pipe 24 is discharged through the connecting cover 28, the sliding pipe 29, the rotating pipe 30 and the second sewage discharge pipe 31, and the raw water drives the impurities to be discharged together when it is discharged.

[0034] The closing mechanism includes a rotating baffle 25. The rotating baffle 25 is symmetrically arranged inside the drain outlet. The rotating shafts at both ends of the rotating baffle 25 are rotatably arranged in the mounting holes on the inner side of the drain outlet. The rotating shafts at one end of the rotating baffle 25 extend into the water inlet cavity. Fixed columns 42 are provided on the rotating shafts at one end of the rotating baffle 25. Spiral grooves 43 are provided on the fixed columns 42. Guide columns 44 are slidably arranged inside the spiral grooves 43. The guide columns 44 are fixedly arranged inside a sleeve pipe 45. The sleeve pipe 45 is sleeved on one end of the fixed column 42. An extension plate is fixedly arranged at one end of the sleeve pipe 45. Guide slide rods are slidably arranged on the extension plate. The guide slide rods are fixedly arranged at the bottom end of the first partition plate 18. A connecting plate is fixedly arranged between two sleeve pipes 45 on the same side. A push rod 46 is fixedly arranged at a position corresponding to the connecting plate on the outer side of the connecting cover 28. Anti-flushing discs 47 are fixedly arranged at the upper ends inside the filter mesh cylinder 23. A filter screen is provided at the bottom end of the anti-flushing disc 47. A return pipe 48 is communicated inside each anti-flushing disc 47. One end of the return pipe 48 extends outside the fixed pipe 24. During use, in the process of the connecting cover 28 being sleeved and matched with the communicating pipe, the connecting cover 28 drives the push rod 46 to move. When one end of the push rod 46 is in close contact with the bottom end of the connecting plate, the push rod 46 pushes the two sleeve pipes 45 to slide through the connecting plate. The sleeve pipe 45 drives the guide column 44 to move. The guide column 44 slides in the spiral groove 43, so that the fixed column 42 drives the rotating baffle 25 to rotate. When the connecting cover 28 stops moving, the two rotating baffles 25 close the liquid discharge port, so that the inside of the fixed pipe 24 is closed. When the external liquid extraction component extracts the raw water inside the filter mesh cylinder 23, the raw water inside the filtration cavity enters the anti-flushing disc 47 through the return pipe 48. The anti-flushing disc 47 discharges the raw water, so as to replace the raw water inside the fixed pipe 24. At the same time, since the raw water inside the filtration cavity is replaced from the end of the filter mesh cylinder 23, the impurities inside the filter mesh cylinder 23 are discharged.

[0035] A cleaning rod is tightly attached to the bottom end of the filter screen. The cleaning rod is fixedly arranged at one end of the scraping rod 26. During use, it is convenient to clean the impurities attached to the bottom end of the anti-flushing disc 47, so as to prevent the filter screen at the bottom end of the anti-flushing disc 47 from being blocked.

[0036] The above embodiment discloses a multi-stage filtration device for pure water treatment. Among them, when filtering and producing pure water, the water inlet pipe 20 on the outermost filtration component 11 is communicated with the output end of the external liquid supply component. Subsequently, the raw water enters the water inlet cavity. Then, the raw water enters the filtration cavity through the filter mesh cylinder 23. The raw water filtered by the filter mesh cylinder 23 is discharged through the water outlet pipe 21 and enters the next filtration component 11 through the first connecting pipe 13 for multi-stage filtration. After the raw water is filtered by the last filtration component 11, it enters the reverse osmosis purification component 12 for reverse osmosis purification.

[0037] When the external detection component detects a decrease in the pressure at the end of the water pipe 21, the external control component is activated through the electric cylinder 41. The output end of the electric cylinder 41 drives the sliding push rod 40 to slide, and the sliding push rod 40 drives the sliding pipe 29 and the connecting cover 28 to slide, causing the connecting cover 28 to disengage from the end of a communicating pipe. At this time, the filter screen cylinder 23 coaxial with the connecting cover 28 is in the unused state after cleaning. Subsequently, the external control component controls the first motor 33 to start, and the first motor 33 drives the rotating pipe 30 to rotate. The rotating pipe 30 drives the connecting cover 28 to rotate 90 degrees through the sliding pipe 29, so that the connecting cover 28 is located below the other communicating pipe and is coaxial with the communicating pipe. Subsequently, the output end of the electric cylinder 41 contracts, and the sliding push rod 40 drives the sliding pipe 29 and the connecting cover 28 to rise, thereby causing the connecting cover 28 to be sleeved with the communicating pipe. At the same time, the connecting cover 28 drives the ejector rod 46 to move. When one end of the ejector rod 46 is in close contact with the bottom end of the connecting plate, the ejector rod 46 pushes the two sleeve pipes 45 to slide through the connecting plate. The sleeve pipes 45 drive the guide posts 44 to move, and the guide posts 44 slide in the spiral groove 43, thereby causing the fixed post 42 to drive the rotating baffle 25 to rotate. When the connecting cover 28 stops moving, the two rotating baffles 25 close the drain port, and the friction concave wheel 35 is in close fit with the friction cam 34. Subsequently, the second motor 39 is started, and the second motor 39 drives the transmission shaft 36 to rotate through the second rotating shaft 37. The transmission shaft 36 drives the friction concave wheel 35 to rotate, and the friction concave wheel 35 and the friction cam 34 cooperate to drive the first rotating shaft 27 to rotate. The first rotating shaft 27 drives the scraping rod 26 to rotate. Since the scraping rod 26 is in close contact with the inner wall of the filter screen cylinder 23, the scraping rod 26 scrapes off the impurities attached to the inner wall of the filter screen cylinder 23, thereby cleaning the inner wall of the filter screen cylinder 23. The scraping rod 26 cleans the filter screen at the bottom end of the backwashing plate 47 through the cleaning rod.

[0038] Subsequently, the second valve 16 is opened, and the external liquid extraction component works, so that the raw water inside the fixed pipe 24 is discharged through the connecting cover 28, the sliding pipe 29, the rotating pipe 30 and the second sewage discharge pipe 31. When the raw water is discharged, the impurities are discharged together. At the same time, the raw water inside the filter chamber enters the inside of the backwashing plate 47 through the return pipe 48, and the backwashing plate 47 discharges the raw water, so as to replace the raw water inside the fixed pipe 24. At the same time, since the raw water inside the filter chamber is replaced from the end of the filter screen cylinder 23, the impurities inside the filter screen cylinder 23 are discharged.

[0039] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A multi-stage filtration device for pure water treatment, comprising a filtration component and a reverse osmosis purification component. The filtration component includes a filtration tank, and a first partition and a second partition are fixedly arranged inside the filtration tank. A filtration chamber is formed between the upper end of the first partition and the upper end inside the filtration tank, and a water inlet chamber is formed between the bottom end of the first partition and the upper end of the second partition. A plurality of filter mesh cylinders are arranged in a circumferential array inside the filtration chamber, and a communication pipe is connected to one end of each filter mesh cylinder. The communication pipe is fixedly arranged in the mounting hole at the upper end of the first partition. It is characterized in that, Inside the filtration chamber, fixed pipes are provided coaxially with the filter mesh cylinders. Drainage ports are provided on the fixed pipes. Inside the water inlet chamber, a cleaning mechanism is provided for cleaning the impurities inside several filter mesh cylinders. Inside the drainage port on one side of the fixed pipe, a closing mechanism is provided for closing the inside of the fixed pipe.

2. The multi-stage filtration device for pure water treatment according to claim 1, characterized in that, At positions corresponding to the filtration chamber and the water inlet chamber on the filtration tank, a water outlet pipe and a water inlet pipe are respectively communicated. Several filtration components are fixedly arranged at the upper end of the mounting table. Between several filtration components, they are communicated through a first connecting pipe. At the end of the water outlet pipe of one filtration component, a third connecting pipe is communicated. The other end of the third connecting pipe is communicated with the input end of the reverse osmosis purification component.

3. A multi-stage filtration device for pure water treatment according to claim 2, characterized in that, The cleaning mechanism includes a scraping rod and a connecting cover. The scraping rods are closely attached to the inner walls of the filter mesh cylinders. On one side of each scraping rod, several connecting rods are fixedly provided. The other ends of the connecting rods are fixedly arranged on a first rotating shaft. One end of the first rotating shaft is rotatably arranged at the upper end inside the filter mesh cylinder. On the other end of the first rotating shaft, a support frame is rotatably arranged. The support frame is fixedly arranged inside the communicating pipe. A transmission pipe is communicated on the connecting cover. The other end of the transmission pipe is communicated with a sliding pipe.

4. The multi-stage filtration device for pure water treatment according to claim 3, characterized in that, One end of the sliding pipe is slidably sleeved with a rotating pipe. One end of the rotating pipe extends outside the filtration tank. One end of the rotating pipe is rotatably communicated with a second sewage discharge pipe. On one end of the rotating pipe, a driven gear is fixedly provided. A driving gear is meshed with the driven gear. The driving gear is fixedly arranged on the output end of a first motor. The first motor is fixedly arranged at the bottom end of the filtration tank. The connecting cover is slidably sleeved and matched with one end of the communicating pipe. A driving component is provided inside the connecting cover and the sliding pipe for driving the first rotating shaft to rotate.

5. A multi-stage filtration device for pure water treatment according to claim 4, characterized in that, The driving component includes a friction concave wheel. A friction cam is frictionally engaged inside the friction concave wheel. One end of each first rotating shaft is fixedly provided with a friction cam. The friction concave wheel is fixedly arranged at one end of a fixed shaft. The fixed shaft is rotatably arranged in the mounting hole at the upper end of the fixed box. The other end of the fixed shaft is fixedly provided with a first bevel gear. A second bevel gear is meshed with the first bevel gear. The second bevel gear is fixedly arranged at one end of a transmission shaft.

6. A multi-stage filtration device for pure water treatment according to claim 5, characterized in that, The transmission shaft is rotatably arranged in the mounting hole on one side of the fixed box. The other end of the transmission shaft is fixedly provided with a third bevel gear. A fourth bevel gear is meshed with the third bevel gear. The fourth bevel gear is fixedly arranged at one end of a second rotating shaft. A sealing inclined plate is rotatably arranged on the outside of the transmission shaft. The sealing inclined plate is fixedly arranged inside the sliding pipe. The fixed box is fixedly arranged at the bottom end inside the connecting cover. A sliding push rod is rotatably arranged on the outside of the second rotating shaft. One end of the sliding push rod is rotatably arranged at the upper end of the sliding pipe.

7. A multi-stage filtration device for pure water treatment according to claim 6, characterized in that, The other end of the second rotating shaft is fixedly provided with an external spline shaft. An internal spline shaft is matched with the external spline shaft. The internal spline shaft is fixedly arranged on the output end of a second motor. The second motor is fixedly arranged at the upper end inside the fixed frame. The fixed frame is fixedly arranged at the upper end of the filtration tank. The other end of the sliding push rod is fixedly provided with a connecting plate. The two ends of the connecting plate are respectively fixedly connected to the output ends of two electric cylinders. The electric cylinders are both fixedly arranged at the upper end inside the fixed frame.

8. A multi-stage filtration device for pure water treatment according to claim 7, characterized in that, One end of the second sewage discharge pipe is connected with a second valve. A first sewage discharge pipe is connected to the water inlet chamber of the filter tank. One end of the first sewage discharge pipe is connected with a second connecting pipe. One end of the second connecting pipe is connected with a first valve. One ends of the second connecting pipe and the second sewage discharge pipe are both connected to the input end of an external liquid pumping component.

9. A multi-stage filtration device for pure water treatment according to claim 8, characterized in that, The closing mechanism includes a rotating baffle. Rotating baffles are symmetrically arranged inside the drain opening. Rotating shafts at both ends of the rotating baffle are rotatably arranged in mounting holes on the inner side of the drain opening. Fixing columns are arranged on the rotating shafts at one end of the rotating baffle. Spiral grooves are arranged on the fixing columns. Guide columns are slidably arranged inside the spiral grooves. The guide columns are fixedly arranged inside the sleeve pipe. An extension plate is fixedly arranged at one end of the sleeve pipe. Guide slide rods are slidably arranged on the extension plate. The guide slide rods are fixedly arranged at the bottom end of the first partition plate. A connecting plate is fixedly arranged between two sleeve pipes on the same side. A jacking rod is fixedly arranged at a position corresponding to the connecting plate on the outer side of the connecting cover.

10. A multi-stage filtration device for pure water treatment according to claim 9, characterized in that, Backwashing discs are fixedly arranged at the upper end inside the filter mesh cylinder. A filter mesh is arranged at the bottom end of the backwashing disc. A return pipe is communicated inside the backwashing disc. One end of the return pipe extends to the outside of the fixed pipe. A cleaning rod is closely arranged at the bottom end of the filter mesh. The cleaning rod is fixedly arranged at one end of the scraping rod.

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