Water enters into the entrance. First, the primary strainer filters out the larger particles of impurities, and then reaches the fine strainer. In the process of filtering, fine strainer gradually accumulates impurity in the water and forms a filter impurities layer. Because impurities layer accumulates inside, the two sides of the fine strainer form a pressure gage.
◆ Process principle of the automatic self-cleaning filter (b)
After water enters into the filter body from the entrance, the impurities in water sedimentate on the stainless steel strainer thus form pressure. Through the pressure switch to monitor changes in pressure, when the pressure access to the setting value, the electric controller send signal to the hydraulic control valve and driving motor, and then trigger the following actions: motor driving rotary brushes, cleaning the filter, control Valve opening and blowdowning. The entire washing process takes several seconds. When the cleaning is over, control valves will close, electrical motor will stop rotation, and the system will return to its initial state, begin filtering into the next process.
After equipment is installed, commissioning by the technical staff. Set the time of filtering and cleaning conversion time. After water enters into the filter body, the filter started to work, when reach the default time, the electric controller send signal to the hydraulic control valve and driving motor, and then trigger the following actions: motor driving rotary brushes, cleaning the filter, control Valve opening and blowdowning. The entire washing process takes several seconds. When the cleaning is over, control valves closes, electrical motor stop rotation, and the system returned to its initial state, began filtering into the next process.
◆ Process principle of the automatic self-cleaning filter (c)
Water enters into the filter from the entrance. First, the primary strainer filters out the larger particles of impurities, and then reaches the fine strainer. Through fine strainer filters small particles of impurities, the water discharges from the outlet. In the filtering process, impurities layer accumulates inside, the two sides of the fine strainer form a pressure gage.
When the pressure gage reaches the default value, self-cleaning will begin: cleaning valve opens, the hydraulic components and hydraulic cylinder motor room release pressure and discharge water; pressure in hydraulic motors room and sewage suction pipe drops sharply. Owing to the negative pressure, the dirt is absorbed by suction nozzle inside the fine strainer, enters into the hydraulic motor room relaying on the hydraulic motors, and then discharges from the sewage valve, thus finishes a suction sewage process. When the flow passes the hydraulic motors, it drives sewage suction pipe rotating, the hydraulic cylinder piston drive the sewage suction pipe for axial movement, sewage suction machine‘s axial movement and rotation during the entire filter, clean the surface completely. The entire washing process takes several seconds. Sewage valve closes after the washing. The increased pressure drives the hydraulic cylinder piston back to its initial position, Filter will prepare for the next wash cycle. In the washing process, the filter’s normal filtering work won’t be uninterrupted
