Front filter
A technology of pre-filter and filter interface, applied in the direction of filtration treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve problems such as uneven filtration accuracy, filter pollution, secondary pollution, etc., and achieve convenience Cleaning and maintenance, recovery of filtration performance, good self-cleaning effect
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[0036] Such as figure 1 , 2 As shown, the pre-filter proposed by the present invention includes: an upper cover 1 , a cylinder 2 fixed at the lower end of the upper cover 1 , a magnetized filter element 3 and a spiral filter element 4 arranged in the cylinder body 2 . The bottom of the upper cover 1 is open and there are separated water inlets and outlets on both sides. The inner inlet of the water outlet 11 extends downward to form a filter interface 12. The upper end of the cylinder 2 is open, and the upper end of the cylinder 2 is connected to the bottom of the upper cover 1 The end opening is sealed and connected. The magnetized filter element 3 is arranged in the center of the cylinder body 2. The spiral filter element 4 includes a spiral frame 41 and at least one layer of spiral filter screen 42 covered along its spiral surface. The spiral frame 41 is arranged in the cylinder body 2 and surrounds it. In the magnetized filter element 3 , the outer edge of the spiral fram...
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