Filter equipment in advance

The utility model discloses a filter equipment in advance, it is installed on purifying body, including reticular filter screen body, the border position of filter screen body is equipped with the support limit of buckling downwards, make up into an elasticity clamping device by the support limit around the filter screen body, this elasticity clamping device centre gripping is on purifying body, and at the tip installation coupling mechanism of filter screen body, this coupling mechanism is connected with purifying body makes the filter screen body fix on purifying body simultaneously. The beneficial effects of the utility model are that, can filter the material of large granule in advance for the filter effect of clarifier is better, also can reduce the frequency of changing the clarifier filter screen, the firm and convenient to use of its installation.