Cleaning system for inner side of filter screen of filter

Abstract

The utility model relates to the technical field of filters, and discloses a filter screen inner side cleaning system which comprises a filter body, the filter body comprises a barrel, a filter screen is arranged in the barrel, the upper end face and the lower end face of the filter screen are connected with an upper cover and a lower cover of the barrel respectively, a backwashing device is arranged in the filter screen, and the backwashing device comprises a backwashing pipeline. The backwashing pipeline is connected with a nozzle corresponding to the inner wall of the filter screen, the upper cover is rotatably connected with a transmission shaft, the transmission shaft is provided with a hollow cavity, the hollow cavity is communicated with a purified water pipeline for supplying purified water, and the nozzle is communicated with the hollow cavity through the backwashing pipeline. The problems that a traditional spray head cannot directly act on the inner wall of the filter screen, and the cleaning effect is poor are solved; meanwhile, structural configuration is simplified, operation is convenient and flexible, the problems that a traditional filter is complex in structure and inconvenient to disassemble and assemble are solved, and maintenance cost is reduced; in addition, the cleaning mechanism integrally arranged in the filter screen does not occupy the space of the barrel, and the overall size of the filter is compressed.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a system for cleaning the inner side of a filter screen of a filter. Background Art

[0002] Chinese utility model patent publication number CN213760745U discloses a high-pressure vacuum backwash system for a filter. The system comprises a drive shaft, a drive nut capable of linear motion along a drive screw, one end of which is flat and inserted into a flat sleeve at the end of the drive shaft through the inner side of the drive nut. The other end of the drive screw is connected to a reducer. The drive sleeve is equipped with a travel switch. Pipes connect the drive shaft to a high-pressure cleaning device on both sides, located between the corrugated filter and the inner wall of the cylinder. Vacuum nozzles for drainage are connected to the drive shaft on both sides of the inner section of the corrugated filter through suction pipes. A high-pressure vacuum nozzle assembly is provided on the side of the high-pressure cleaning device facing the corrugated filter. The high-pressure vacuum nozzle assembly and the vacuum nozzle for drainage correspond to each other on the inner and outer sides of the corrugated filter, respectively. A high-pressure vacuum nozzle sheath is connected to the outer periphery of the high-pressure vacuum nozzle on the end facing the corrugated filter. The system achieves the technical benefits of a high degree of automation, ideal filtration effect, high filtration efficiency, and thorough filter cleaning. However, some problems have been exposed during actual application:

[0003] Traditional filter backwash pipes are located outside the filter screen, and the sewage collection nozzle on the sewage hollow shaft is located inside the filter screen. A blind plate is also welded to the top of the filter screen. When maintaining and replacing the seals of the sewage discharge part, it is necessary to remove the transmission mechanism, cylinder cover, cleaning device, filter screen, sewage hollow shaft and other components in sequence to complete the maintenance work. Disassembly and assembly is time-consuming and labor-intensive, with high maintenance costs and requiring special personnel to operate.

[0004] The nozzles and drain pipes of traditional filter cleaning devices are located on both sides of the filter. When the drive shaft drives the cleaning device to reciprocate axially to clean the filter, a larger installation and travel space is required along the length of the cylinder (the backwash pipeline is located outside the filter and occupies the cylinder space, and it is necessary to reserve travel space between the backwash pipeline and the upper plate, and between the drain pipeline and the filter blind plate), thus increasing the overall volume of the filter.

[0005] Most of the impurities in the raw water are adsorbed on the inner wall of the filter. The traditional filter nozzle backwashes from the outside of the filter to the inside for cleaning, and cannot directly act on the inner wall. The cleaning effect needs to be further improved.

[0006] Based on this, developing a new filter screen inner cleaning system for application in actual production is an urgent problem to be solved. Utility Model Content

[0007] The purpose of this utility model is to address the above problems and provide a filter screen inner cleaning system to solve the problems of complex structure, large size, and inconvenient disassembly and maintenance of existing filters, while also solving the problem of unsatisfactory cleaning effect of existing filter elements.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0009] A system for cleaning the inside of a filter screen comprises a filter body, the filter body comprising a barrel, the upper and lower ends of the barrel being respectively connected to an upper cover and a lower cover, a filter screen being arranged in the barrel body, the upper and lower end faces of the filter screen being respectively connected to the upper cover and the lower cover, a backwash device being arranged in the filter screen, the backwash device comprising a backwash pipeline, the backwash pipeline being connected to a nozzle corresponding to the inner wall of the filter screen, a transmission shaft being rotatably connected to the upper cover, the transmission shaft having a hollow chamber, the hollow chamber being connected to a clean water pipeline for supplying clean water, and the nozzle being connected to the hollow chamber through the backwash pipeline.

[0010] Preferably, the lower end of the transmission shaft is fixedly connected to a drain hollow shaft, the drain hollow shaft is connected to a drain pipeline, the front end of the drain pipeline is arranged corresponding to the nozzle, and the tail end of the drain pipeline is connected to the drain hollow shaft.

[0011] Preferably, a drain nozzle is provided at the front end of the backwash pipeline, the extended end of the drain nozzle is close to the inner wall of the filter screen, a mounting hole is opened on the drain nozzle, the nozzle is passed through the mounting hole and is arranged toward the inner wall of the filter screen.

[0012] Preferably, the nozzle is arranged at a certain tilt angle so that the clean water is sprayed obliquely onto the inner wall of the filter.

[0013] Preferably, the nozzle has an inclination angle of 40-60° relative to the vertical direction of the filter screen.

[0014] Preferably, the clean water pipeline is connected to the clean water chamber of the cylinder to supply clean water for flushing through the backwash pipeline.

[0015] Preferably, the upper and lower end surfaces of the upper cover and the lower cover corresponding to the filter screen are respectively provided with assembly rings, and the inner diameter of the assembly rings is set corresponding to the caliber of the filter screen end surface.

[0016] The beneficial effects of the present invention are:

[0017] The utility model replaces the traditional filter backwash pipeline which is set on the outside of the filter and flushes the filter from the outside to the inside, improves the problem that the nozzle cannot directly act on the inner wall of the filter and the cleaning effect is poor, and improves the filter cleaning efficiency and cleaning effect; at the same time, the backwash device is set inside the filter, which simplifies the structural configuration. When performing disassembly and maintenance operations, there is no need to remove irrelevant components such as the transmission mechanism in turn. Only the upper cover or the lower cover needs to be removed to quickly complete routine maintenance operations such as replacement of wearing parts and seals. The operation is convenient and flexible, improves the problems of complex structure and inconvenient disassembly and assembly of traditional filters, and reduces maintenance costs; in addition, the cleaning mechanism as a whole is arranged inside the filter without occupying the cylinder space, and since there is no filter blind plate, only the travel space between the backwash pipeline and the upper cover needs to be reserved, which effectively compresses the overall volume of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 for Figure 1 Cross-sectional view along the AA direction.

[0021] Figure 3 for Figure 1 A partial enlarged view of point B in the middle.

[0022] Figure 4 for Figure 1 A partial enlarged view of point C in the middle.

[0023] In the figure: 10--cylinder body; 11--upper cover; 12--lower cover; 13--filter screen; 14--drive shaft; 15--hollow chamber; 16--water inlet; 17--clean water outlet; 18--assembly ring; 20--backwash device; 21--backwash pipeline; 22--nozzle; 23--clean water pipeline; 24--sewage discharge hollow shaft; 25--sewage discharge pipeline; 26--sewage discharge nozzle.

[0024] The arrows in the figure represent the flow direction of flushing water and sewage. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] like Figure 1-4As shown, a system for cleaning the inside of a filter screen includes a filter body, wherein the filter body includes a barrel 10, and the upper and lower ends of the barrel 10 are respectively connected to an upper cover 11 and a lower cover 12. A filter screen 13 is provided in the barrel body, and the upper and lower end faces of the filter screen 13 are respectively connected to the upper cover 11 and the lower cover 12. A backwash device 20 is provided in the filter screen 13 corresponding to the inner wall of the filter screen 13, and the backwash device 20 includes a backwash pipeline 21, and the backwash pipeline 21 is connected to a nozzle 22 corresponding to the inner wall of the filter screen 13, and the backwash pipeline 21 is connected to the clean water pipeline 23 to perform a backwash operation on the inner wall of the filter screen 13. Specifically, a transmission shaft 14 is rotatably connected to the upper cover 11, and the transmission shaft 14 has a hollow chamber 15. The hollow chamber 15 is connected to the clean water pipeline 23 to obtain a clean water supply for flushing, and the nozzle 22 is connected to the hollow chamber 15 through the backwash pipeline 21.

[0027] During use, raw water enters the filter screen 13 through the water inlet 16 for filtration. Impurities and other contaminants in the raw water are filtered by the filter screen 13 and adhere to the inner wall of the filter screen 13. The filtered clean water enters the clean water cavity of the cylinder 10 and is then discharged through the clean water outlet 17, completing the raw water filtration process. When the filter screen 13 needs to be cleaned, the clean water supplied by the clean water pipeline 23 passes through the hollow chamber 15 of the drive shaft 14 into the backwash pipeline 21 and is sprayed onto the inner wall of the filter screen 13 through the nozzle 22 to rinse away impurities and other contaminants attached to the filter screen 13.

[0028] This embodiment replaces the traditional filter backwash pipe 21 set on the outside of the filter 13, and the cleaning method of flushing the filter 13 from the outside to the inside, thereby improving the problem that the nozzle cannot directly act on the inner wall of the filter 13 and the cleaning effect is poor, and improving the cleaning efficiency and cleaning effect of the filter 13; at the same time, the backwash device 20 in this embodiment is set inside the filter 13, which simplifies the structural configuration. When performing disassembly and maintenance operations, there is no need to remove irrelevant components such as the transmission mechanism in turn. Only the upper cover 11 or the lower cover 12 needs to be removed to quickly complete routine maintenance operations such as replacement of wearing parts and seals. The operation is convenient and flexible. It improves the problems of complex structure and inconvenient assembly and disassembly of traditional filters and reduces maintenance costs. In addition, the cleaning mechanism set as a whole inside the filter 13 does not occupy the space of the cylinder 10, and since there is no blind plate configuration for the filter 13, only the travel space between the backwash pipe 21 and the upper cover 11 needs to be reserved, which effectively compresses the overall volume of the filter.

[0029] As a preferred embodiment, the lower end of the transmission shaft 14 is fixedly connected to a drain hollow shaft 24, and a drain pipe 25 is connected to the drain hollow shaft 24. The front end of the drain pipe 25 is arranged corresponding to the nozzle 22, and the tail end of the drain pipe 25 is connected to the drain hollow shaft 24, which is used to recover the sewage after the filter 13 is cleaned. Preferably, the front end of the backwash pipe 21 is provided with a drain nozzle 26, and the extended end of the drain nozzle 26 is close to the inner wall of the filter 13. The drain nozzle 26 is provided with a mounting hole, and the nozzle 22 is inserted into the mounting hole and arranged toward the inner wall of the filter 13. During cleaning, the flushing water sprayed by the nozzle 22 will be sprayed on the inner wall of the filter 13 to flush impurities attached to the filter 13. The sewage mixed with impurities and other pollutants is collected in the drain nozzle 26 and passed through the drain pipe 25 into the drain hollow shaft 24 to be discharged from the cylinder 10. In this embodiment, the nozzle 22 and the drain nozzle 26 cooperate to ensure that flushing and draining operations can precisely and efficiently clean the area covered by the drain nozzle 26, thereby improving cleaning effectiveness and efficiency. Furthermore, in this embodiment, the water pressure from the nozzle 22 provides drainage pressure for the drain pipe 25, eliminating the need for vacuuming the drain pipe 25 to create a negative pressure. This further simplifies the structural configuration and reduces the waste of raw water.

[0030] As a preferred embodiment, the nozzle 22 is set at a certain tilt angle so that the clean water is sprayed obliquely on the inner wall of the filter 13 to improve the cleanliness of the filter 13. Preferably, the tilt angle of the nozzle 22 relative to the vertical direction of the filter 13 is 40-60 degrees to obtain a better cleaning effect.

[0031] As a preferred embodiment, the clean water line 23 connects to the clean water chamber of the cylinder 10 to supply clean flushing water to the backwash line 21, eliminating the need for an additional clean flushing water source and further simplifying the structural configuration. Furthermore, the clean water line 23 relies on the raw water pressure to supply clean flushing water to the backwash line 21, saving power. A one-way valve is provided on the clean water line 23 to prevent raw water from flowing back through the clean water line 23 from the filter 13 and contaminating the clean water.

[0032] As a preferred embodiment, mounting rings 18 are provided on the upper and lower covers 11 and 12, corresponding to the upper and lower end surfaces of the filter screen 13. The inner diameter of the mounting rings 18 corresponds to the diameter of the end surface of the filter screen 13. During assembly, the upper and lower end surfaces of the filter screen 13 are respectively fixed to the inner diameter of the mounting rings 18, which facilitates the positioning and installation of the filter screen 13, improves assembly accuracy, and enhances the sealing performance between the filter screen 13 and the cylinder 10.

[0033] The above disclosure is only a specific embodiment of the present invention, but the present invention is not limited thereto. For ordinary technicians in this field, without departing from the principle of the present invention, any deformation made should be deemed to be protected by the present invention.

Claims

1. A filter screen inner cleaning system, comprising a filter body, wherein the filter body comprises a cylinder (10), characterized in that: The upper and lower ends of the barrel (10) are respectively connected to an upper cover (11) and a lower cover (12); a filter screen (13) is provided in the barrel; the upper and lower end surfaces of the filter screen (13) are respectively connected to the upper cover (11) and the lower cover (12); a backwash device (20) is provided in the filter screen (13); the backwash device (20) comprises a backwash pipeline (21); the backwash pipeline (21) is connected to a nozzle (22) corresponding to the inner wall of the filter screen (13); a transmission shaft (14) is rotatably connected to the upper cover (11); the transmission shaft (14) has a hollow chamber (15); the hollow chamber (15) is connected to a clean water pipeline (23) for supplying clean water; and the nozzle (22) is connected to the hollow chamber (15) through the backwash pipeline (21).

2. A filter screen inner cleaning system according to claim 1, characterized in that: The lower end of the transmission shaft (14) is fixedly connected to a sewage discharge hollow shaft (24), and the sewage discharge hollow shaft (24) is connected to a sewage discharge pipeline (25). The front end of the sewage discharge pipeline (25) is arranged corresponding to the nozzle (22), and the rear end of the sewage discharge pipeline (25) is connected to the sewage discharge hollow shaft (24).

3. The filter screen inner cleaning system according to claim 1, characterized in that: A sewage discharge nozzle (26) is provided at the front end of the backwash pipeline (21), and an extended end of the sewage discharge nozzle (26) is in close contact with the inner wall of the filter screen (13). A mounting hole is provided on the sewage discharge nozzle (26), and the nozzle (22) is passed through the mounting hole and is arranged toward the inner wall of the filter screen (13).

4. A filter screen inner cleaning system according to claim 1, characterized in that: The nozzle (22) is arranged at a certain tilt angle so that the clean water is sprayed obliquely onto the inner wall of the filter (13).

5. A filter screen inner cleaning system according to claim 4, characterized in that: The nozzle (22) has an inclination angle of 40-60° relative to the vertical direction of the filter screen (13).

6. The filter screen inner cleaning system according to claim 1, characterized in that: The clean water pipeline (23) is connected to the clean water chamber of the cylinder (10) to supply clean flushing water to the backwash pipeline (21).

7. The filter screen inner cleaning system according to claim 1, characterized in that: The upper and lower end surfaces of the upper cover (11) and the lower cover (12) corresponding to the filter screen (13) are respectively provided with assembly ring platforms (18), and the inner diameter of the assembly ring platform (18) is set to correspond to the diameter of the end surface of the filter screen (13).

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