The invention discloses filtering equipment capable of adjusting the size of filtering holes in a pneumatic folding mode, and belongs to the technical field of
sewage filtering, the filtering equipment comprises an equipment main body internally provided with a filtering cavity, and a pneumatic folding filtering
assembly, a filtering device and a pneumatic folding device are erected in the filtering cavity. The filter device is a folding filter screen and is provided with a plurality of fold lines which extend front and back and are arrayed left and right, and the fold lines are flexibly connected through an elastic belt; the crease lines are divided into a first crease line (low position) and a second crease line (high position) which are alternately distributed, a lower groove inclining towards the first crease line is formed in the first crease line, and filtering holes are evenly formed in the groove along the crease lines. The pneumatic folding device comprises hanging pieces with hanging grooves, hanging rods fixed to the
cavity wall, corrugated air pipes connecting the adjacent hanging pieces, an
air pump, a main air conveying
pipe and an auxiliary air conveying
pipe. When the
air pump inflates / exhausts air to drive the corrugated air
pipe to stretch and retract, the folding filter screen is driven by the hanging piece to stretch / fold, the sizes of all the filter holes are synchronously adjusted, different
water quality interception requirements are met, filter screen replacement is reduced, and adaptability is improved.