Low-cost filter backwashing device and backwashing method thereof

Abstract

The invention discloses a low-cost filter back-flushing device and a flushing method thereof, and relates to the technical field of filter back-flushing, the low-cost filter back-flushing device comprises a filter main body and a back-flushing main body, the back-flushing main body is located at the upper end of the filter main body, the lower end of the filter main body is provided with a discharging assembly, and the discharging assembly is located at the lower end of the filter main body. The backwashing main body comprises a backwashing motor and a connecting rod sleeve, a connecting sleeve is arranged on the lower surface of the connecting rod sleeve, a process detection photoelectric switch is arranged on one side of the connecting sleeve, and an in-place detection photoelectric switch is arranged below the process detection photoelectric switch; according to the scheme, the problems that the action logic of an existing filter backwashing device is controlled by a mainboard, the mainboard control has high requirements on the field environment, the failure rate of the mainboard is greatly increased due to the fact that the mainboard is high in precision, insufficient in protection level and high in field environment humidity, and the cost for upgrading and maintaining the filter is up to hundreds of thousands of thousands of products, and the cost is high are solved.

Description

Technical Field

[0001] The invention relates to the technical field of filter backwashing, in particular to a low-cost filter backwashing device and a backwashing method thereof. Background Art

[0002] The action logic of the filter backwash device is controlled by the main board. Water enters from the inlet, first passes through the coarse filter to filter out larger particles of impurities, and then reaches the fine filter. During the filtering process, the fine filter gradually accumulates dirt and impurities in the water to form a filter impurity layer. Since the impurity layer accumulates on the inner side of the fine filter, a pressure difference is formed on the inner and outer sides of the fine filter. When the pressure difference of the filter reaches the preset value, the automatic cleaning process will begin. During this period, the clean water supply is continuously flowing, the cleaning valve is opened, and the water pressure in the cleaning chamber and the sewage suction device drops significantly. Through the pressure difference between the filter cartridge and the sewage suction pipe, a suction force is generated between the sewage suction pipe and the cleaning chamber through the suction nozzle, forming a sewage suction process; For example, the Chinese authorized patent with announcement number CN218530200U (a filter backwashing device): the driving motor is provided with a dredging device, and the dredging device includes: a main rotating rod, the outer wall of the main rotating rod is fixedly connected to one side of the filter screen, and a cylinder is provided on the inner wall of the main rotating shaft, and the cylinder will drive the dredging module at the lower end to reciprocate. This device can prevent excessive accumulation of garbage on the inner wall of the machine body from causing blockage, and effectively improve the stability and service life of the machine. The filter backwashing device is provided with a cleaning device, which will push the cleaning module forward when the water is discharged from the drain port after filtering, and when moving forward, it will drive the cleaner on the side wall to remove the residual garbage attached to the inner wall of the drain port. This mechanism can help keep the inner wall of the drain port clean, reduce the time for daily maintenance and maintenance of the filter, and improve work efficiency.

[0003] The existing filter backwashing device has an action logic of mainboard control. Water enters from the inlet and first passes through the coarse filter to filter out larger particles of impurities, and then reaches the fine filter. During the filtering process, the fine filter gradually accumulates dirt and impurities in the water to form a filtered impurity layer. Since the impurity layer accumulates on the inner side of the fine filter, a pressure difference is formed on the inner and outer sides of the fine filter. When the pressure difference of the filter reaches the preset value, the automatic cleaning process will begin. During this period, the clean water supply is continuous, the cleaning valve is opened, and the water pressure in the cleaning chamber and the sewage suction device drops significantly. Through the pressure difference between the filter cartridge and the sewage suction pipe, a suction force is generated between the sewage suction pipe and the cleaning chamber through the suction nozzle, forming a sewage suction process. The mainboard control has high requirements on the on-site environment. Due to the high precision of the mainboard and the insufficient protection level, the high humidity of the on-site environment causes the mainboard failure rate to increase significantly. The cost of upgrading and repairing the filter is as high as hundreds of thousands, which is costly. For this reason, we provide a low-cost filter backwashing device and a flushing method thereof. Summary of the invention

[0004] The purpose of the present invention is to provide a low-cost filter backwashing device and a flushing method thereof, so as to solve the problem that the action logic of the existing filter backwashing device proposed in the above background technology is controlled by the mainboard, and the mainboard control has high requirements on the on-site environment. Due to the high precision of the mainboard and insufficient protection level, the high humidity of the on-site environment causes the mainboard failure rate to increase significantly, and the cost of upgrading and repairing the filter product is as high as hundreds of thousands, which is costly.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a low-cost filter backwashing device, comprising a filter body and a backwashing body, and the backwashing body is located at the upper end of the filter body, and a discharge assembly is arranged at the lower end of the filter body, and the backwashing body comprises a backwashing motor and a connecting rod sleeve, and a connecting sleeve is arranged on the lower surface of the connecting rod sleeve, and a process detection photoelectric switch is arranged on one side of the connecting sleeve, and an in-place detection photoelectric switch is arranged below the process detection photoelectric switch, and a control body is arranged on one side of the filter body, and the control body comprises a pressure assembly and a distribution box, and a differential pressure gauge is installed on the front surface of the pressure assembly.

[0006] Preferably, a second fixing flange is provided at the lower end of the connecting sleeve, a connecting column is provided on the upper surface of the second fixing flange, a fixing disk is provided on the outer wall of the connecting rod sleeve, and the top end of the connecting column passes through the fixing disk, and the top end of the connecting column is externally threaded with a nut.

[0007] Preferably, the filter body comprises a filter barrel, upper and lower ends of the filter barrel are provided with connecting flanges, and a water inlet pipe is provided on one side surface of the filter barrel.

[0008] Preferably, the discharge assembly includes a first fixed flange of an outlet pipe, a sewage pipe is provided on one side of the outlet pipe, a sewage solenoid valve is provided on one side of the sewage pipe, and the upper and lower ends of the filter barrel are threadedly fixed to the backwashing body and the discharge assembly respectively through connecting flange external flange bolts.

[0009] Preferably, the control logic of the backwash body includes a thermal relay, a first relay and a second relay, the output end of the first relay is electrically connected to a contactor, and the output end of the second relay is electrically connected to the input end of the sewage discharge solenoid valve.

[0010] Preferably, a manual test button is installed on one side surface of the distribution box, and a box door is provided on one side of the distribution box.

[0011] Preferably, a support leg is welded on the lower surface of the first fixing flange, and the lower end of the support leg is fixed to the ground by an external grounding bolt.

[0012] Preferably, transport handles are provided on the front and rear surfaces of the filter barrel, and the transport handles are welded and fixed to the filter barrel.

[0013] Preferably, the first relay, the second relay, the contactor and the thermal relay are all installed inside the distribution box.

[0014] Preferably, a low-cost flushing method for a filter backwashing device comprises the following steps: Step 1: The upper and lower ends of the filter barrel are respectively fixed with the backwashing body and the discharge assembly through the connecting flange and the external flange bolts; Step 2: Water enters the water inlet pipe, first passes through the coarse filter to filter out larger particles of impurities, and then reaches the fine filter. During the filtering process, the fine filter gradually accumulates dirt and impurities in the water to form a filter impurity layer. Since the impurity layer accumulates on the inner side of the fine filter, a pressure difference is formed on the inner and outer sides of the fine filter; Step 3: Use a differential pressure gauge to detect that the pressure difference between the inlet and outlet pipes reaches five kilograms, then start the backwash device. You can also start the backwash device by pressing the manual test button; Step 4: The first relay is activated, the contactor is energized and closed, the backwash motor runs, and the connecting rod is driven to rotate and touch the process detection photoelectric switch. The second relay is activated, the cleaning valve coil is energized, the sewage solenoid valve is opened, and the sewage discharge process is carried out. After the connecting rod continues to rotate and drives the block to leave the process detection photoelectric switch, the second relay is disconnected, the cleaning valve coil is de-energized, and the sewage solenoid valve is closed. This cycle is repeated six times to complete one circle. After touching the in-place detection photoelectric switch, if the manual test button is not detected and the differential pressure is below the threshold, the first relay is disconnected, the contactor is de-energized, the backwash motor stops, and a flushing process is completed.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention replaces the original control mainboard by using relays to convert signals without affecting the original working principle, thereby reducing the frequent failure of the mainboard caused by a humid environment and greatly reducing the cost of use. The original mainboard has been discontinued, and the original manufacturer has been contacted to make a plan for product upgrade of the filter, which requires 40,000 yuan per set. The original control cabinet is now modified, and the circuit breaker, fuse, contactor, thermal relay, relay, 24V power supply module and related terminal wires and other consumables used cost no more than 500 yuan in total. The existing filter backwashing device action logic is controlled by the mainboard, and the mainboard control has high requirements on the on-site environment. Due to the high precision of the mainboard and the insufficient protection level, the high humidity of the on-site environment causes the failure rate of the mainboard to increase significantly. The cost of product upgrade and maintenance of the filter is as high as hundreds of thousands, which is costly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall front view structure of the present invention; Figure 3 It is a backwash control logic diagram of the present invention; Figure 4 It is a schematic diagram of the overall top view structure of the present invention; Figure 5 It is a schematic diagram of the overall left side structure of the present invention; In the figure: 1. Filter body; 2. Backwash body; 3. Control body; 4. Filter barrel; 5. Connection flange; 6. Connection sleeve; 7. Connecting rod sleeve; 8. Fixed plate; 9. Connection column; 10. Water inlet pipe; 11. Water outlet pipe; 12. Sewage pipe; 13. Sewage solenoid valve; 14. Support leg; 15. Pressure assembly; 16. Differential pressure gauge; 17. Process detection photoelectric switch; 18. In-place detection photoelectric switch; 19. Distribution box; 20. Manual test button; 21. Box door; 22. Transport handle; 23. First relay; 24. Second relay; 25. Contactor; 26. Thermal relay; 27. Flange bolt; 28. Discharge assembly; 29. ​​Backwash motor; 30. Nut; 31. First fixed flange; 32. Second fixed flange. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-5, an embodiment of the present invention: a low-cost filter backwashing device, comprising a filter body 1 and a backwashing body 2, and the backwashing body 2 is located at the upper end of the filter body 1, and a discharge assembly 28 is arranged at the lower end of the filter body 1, and the backwashing body 2 comprises a backwashing motor 29 and a connecting rod sleeve 7, and a connecting sleeve 6 is arranged on the lower surface of the connecting rod sleeve 7, and a process detection photoelectric switch 17 is arranged on one side of the connecting sleeve 6, and an in-place detection photoelectric switch 18 is arranged below the process detection photoelectric switch 17, and a control body 3 is arranged on one side of the filter body 1, and the control body 3 comprises a pressure assembly 15 and a distribution box 19, and a differential pressure gauge 16 is installed on the front surface of the pressure assembly 15, and a second fixing flange 32 is arranged at the lower end of the connecting sleeve 6, and a connecting column 9 is arranged on the upper surface of the second fixing flange 32, and a fixing plate 8 is arranged on the outer wall of the connecting rod sleeve 7, and the top of the connecting column 9 passes through the fixing plate 8, and the connecting column 9 has an external threaded connection nut 30 at the top, the filter body 1 includes a filter barrel 4, and the upper and lower ends of the filter barrel 4 are provided with connecting flanges 5. A water inlet pipe 10 is provided on one side surface of the filter barrel 4, and the discharge assembly 28 includes a first fixed flange 31 of the outlet pipe 11, a sewage pipe 12 is provided on one side of the outlet pipe 11, and a sewage solenoid valve 13 is provided on one side of the sewage pipe 12. The upper and lower ends of the filter barrel 4 are respectively threadedly fixed with the backwashing body 2 and the discharge assembly 28 through the external flange bolts 27 of the connecting flange 5. The control logic of the backwashing body 2 includes a thermal relay 26, a first relay 23 and a second relay 24. The output end of the first relay 23 is electrically connected to the contactor 25, and the output end of the second relay 24 is electrically connected to the input end of the sewage solenoid valve 13. A manual test button 20 is installed on the surface of one side of the distribution box 19, and a box door 21 is provided on one side of the distribution box 19.

[0019] Use the pressure differential gauge 16 to detect that the pressure difference between the water inlet pipe 10 and the water outlet pipe 11 reaches five kilograms, then start the backwashing device. You can also start the backwashing device by pressing the manual test button 20, the first relay 23 acts, the contactor 25 is energized and attracted, the backwashing motor 29 runs, and the connecting rod is driven to rotate and touch the process detection photoelectric switch 17. The second relay 24 acts, the cleaning valve coil is energized, the sewage solenoid valve 13 is opened, and the sewage process is carried out. After the connecting rod continues to rotate and drives the block to leave the process detection photoelectric switch 17, the second relay 24 is disconnected, the cleaning valve coil is de-energized, and the sewage solenoid valve 13 is closed. After six cycles, one circle is completed and the in-place detection photoelectric switch 1 is touched. 8, if no manual pressing of the manual test button 20 is detected and the differential pressure is below the threshold, the first relay 23 is disconnected, the contactor 25 loses power, the backwash motor 29 stops, and a flushing process is completed. The original control main board is replaced by the relay conversion signal, which reduces the frequent failure of the main board caused by the humid environment and greatly reduces the cost of use. The original main board is discontinued, and the original manufacturer is contacted to make a plan for product upgrade of the filter, which requires 40,000 yuan per set. The original control cabinet is now modified, and the circuit breakers, fuses, contactors, thermal relays, relays, 24V power modules and related terminal wires and other consumables used cost no more than 500 yuan in total, reducing costs.

[0020] See also Figure 1 , 2 A support leg 14 is welded on the lower surface of the first fixing flange 31, and the lower end of the support leg 14 is fixed to the ground with an external grounding bolt to achieve a supporting and fixing effect.

[0021] See also Figure 1 The front and rear surfaces of the filter barrel 4 are both provided with transport handles 22, and the transport handles 22 are welded and fixed to the filter barrel 4. The transport handles 22 facilitate lifting and transporting the entirety, thereby improving mobility.

[0022] See also Figure 1 , 3 The first relay 23, the second relay 24, the contactor 25 and the thermal relay 26 are all installed inside the distribution box 19. The relay is used to convert signals to replace the original control main board, which reduces the frequent failure of the main board caused by the humid environment and greatly reduces the cost of use. The original main board is discontinued, and the original manufacturer is contacted to make a plan for product upgrade of the filter, which requires 40,000 yuan per set. The original control cabinet is now modified, and the circuit breakers, fuses, contactors, thermal relays, relays, 24V power modules and related terminal wires and other consumables used, the total cost does not exceed 500 yuan.

[0023] See also Figure 1-5 A low-cost method for flushing a filter backwashing device comprises the following steps: Step 1: The upper and lower ends of the filter barrel 4 are respectively threadedly fixed to the backwash body 2 and the discharge assembly 28 through the connecting flange 5 and the external flange bolts 27; Step 2: Water enters the water inlet pipe 10, first passes through the coarse filter to filter out larger particles of impurities, and then reaches the fine filter. During the filtering process, the fine filter gradually accumulates dirt and impurities in the water to form a filter impurity layer. Since the impurity layer accumulates on the inner side of the fine filter, a pressure difference is formed on the inner and outer sides of the fine filter; Step 3: Use the pressure differential gauge 16 to detect that the pressure difference between the water inlet pipe 10 and the water outlet pipe 11 reaches five kilograms, and then start the backwashing device. The backwashing device can also be started by pressing the manual test button 20; Step 4: The first relay 23 is actuated, the contactor 25 is energized and closed, and the backwash motor 29 runs, driving the connecting rod to rotate and touch the process detection photoelectric switch 17. The second relay 24 is actuated, the cleaning valve coil is energized, and the sewage solenoid valve 13 is opened to carry out the sewage discharge process. After the connecting rod continues to rotate and drives the block to leave the process detection photoelectric switch 17, the second relay 24 is disconnected, the cleaning valve coil is de-energized, and the sewage solenoid valve 13 is closed. This cycle is repeated six times to complete one circle. After touching the in-place detection photoelectric switch 18, if the manual test button 20 is not detected and the differential pressure is below the threshold, the first relay 23 is disconnected, the contactor 25 is de-energized, and the backwash motor 29 stops, completing a flushing process.

[0024] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A low-cost filter backwashing device, comprising a filter body (1) and a backwashing body (2), wherein the backwashing body (2) is located at the upper end of the filter body (1), and a discharge assembly (28) is provided at the lower end of the filter body (1), characterized in that: The backwashing body (2) comprises a backwashing motor (29) and a connecting rod sleeve (7); a connecting sleeve (6) is provided on the lower surface of the connecting rod sleeve (7); a process detection photoelectric switch (17) is provided on one side of the connecting sleeve (6); and an in-position detection photoelectric switch (18) is provided below the process detection photoelectric switch (17); a control body (3) is provided on one side of the filter body (1); the control body (3) comprises a pressure assembly (15) and a distribution box (19); and a differential pressure gauge (16) is installed on the front surface of the pressure assembly (15).

2. A low-cost filter backwashing device according to claim 1, characterized in that: A second fixing flange (32) is provided at the lower end of the connecting sleeve (6), a connecting column (9) is provided on the upper surface of the second fixing flange (32), a fixing plate (8) is provided on the outer wall of the connecting rod sleeve (7), and the top end of the connecting column (9) passes through the fixing plate (8), and the top end of the connecting column (9) is externally threadedly connected to a nut (30).

3. A low-cost filter backwashing device according to claim 2, characterized in that: The filter body (1) comprises a filter barrel (4), the upper and lower ends of the filter barrel (4) are both provided with connecting flanges (5), and a water inlet pipe (10) is provided on one side surface of the filter barrel (4).

4. A low-cost filter backwashing device according to claim 3, characterized in that: The discharge assembly (28) comprises a first fixed flange (31) of a water outlet pipe (11), a sewage discharge pipe (12) is arranged on one side of the water outlet pipe (11), and a sewage discharge solenoid valve (13) is arranged on one side of the sewage discharge pipe (12), and the upper and lower ends of the filter barrel (4) are respectively threadedly fixed to the backwash body (2) and the discharge assembly (28) via external flange bolts (27) of the connecting flange (5).

5. A low-cost filter backwashing device according to claim 4, characterized in that: The control logic of the backwashing body (2) includes a thermal relay (26), a first relay (23) and a second relay (24), wherein the output end of the first relay (23) is electrically connected to a contactor (25), and the output end of the second relay (24) is electrically connected to an input end of a sewage discharge solenoid valve (13).

6. A low-cost filter backwashing device according to claim 5, characterized in that: A manual test button (20) is installed on one side surface of the distribution box (19), and a box door (21) is provided on one side of the distribution box (19).

7. A low-cost filter backwashing device according to claim 6, characterized in that: A support leg (14) is welded to the lower surface of the first fixing flange (31), and the lower end of the support leg (14) is externally connected to a grounding bolt and fixed to the ground.

8. A low-cost filter backwashing device according to claim 7, characterized in that: The front and rear surfaces of the filter barrel (4) are both provided with transport handles (22), and the transport handles (22) are fixed to the filter barrel (4) by welding.

9. A low-cost filter backwashing device according to claim 8, characterized in that: The first relay (23), the second relay (24), the contactor (25) and the thermal relay (26) are all installed inside the distribution box (19).

10. A low-cost backwashing method for a filter, based on the low-cost backwashing device of claim 9, characterized in that: The following steps are involved: Step 1: The upper and lower ends of the filter barrel (4) are respectively threadedly fixed to the backwash body (2) and the discharge assembly (28) via the connecting flange (5) and the external flange bolts (27); Step 2: water enters the water inlet pipe (10), first passes through a coarse filter to filter out larger particles of impurities, and then reaches a fine filter. During the filtering process, the fine filter gradually accumulates dirt and impurities in the water to form a filter impurity layer. Since the impurity layer accumulates on the inner side of the fine filter, a pressure difference is formed on the inner and outer sides of the fine filter. Step 3: Use a differential pressure gauge (16) to detect that the pressure difference between the water inlet pipe (10) and the water outlet pipe (11) reaches five kilograms, and then start the backwashing device. The backwashing device can also be started by pressing a manual test button (20); Step 4: The first relay (23) is activated, the contactor (25) is energized and attracted, and the backwashing motor (29) is running. When the connecting rod is driven to rotate and touch the process detection photoelectric switch (17), the second relay (24) is activated, the cleaning valve coil is energized, and the sewage discharge solenoid valve (13) is opened to carry out the sewage discharge process. After the connecting rod continues to rotate and drives the block to leave the process detection photoelectric switch (17), the second relay (24) is disconnected, the cleaning valve coil is de-energized, and the sewage discharge solenoid valve (13) is closed. This cycle is completed after six times. After touching the in-position detection photoelectric switch (18), if the manual pressing of the manual test button (20) is not detected and the differential pressure is below the threshold, the first relay (23) is disconnected, the contactor (25) is de-energized, and the backwashing motor (29) stops, completing a flushing process.

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