Patent ID: 8663469

Claim:
A strainer wall structure comprising: an inlet side through which cooling water is introduced and an outlet side through which the cooling water, after filtering, is discharged; a body having openings in directions of the inlet side and the outlet side, and including closed surfaces disposed at side surfaces, an upper plate assembled to an upper part, and a lower plate assembled to a lower part; a plurality of first filter plates inserted into the body and including a plurality of curved sections of a first punched plate, wherein some of the curved sections are convex toward the inlet side, some of the curved sections are convex toward the outlet side, the curved sections are alternately bent, in a zigzag shape, in opposite directions at a predetermined interval, the curved sections include introduction spaces into which the cooling water is introduced and discharging spaces through which the cooling water is discharged, and the introduction and discharging spaces are alternately disposed; a plurality of second filter plates coupled between the first filter plates and comprising a second punched plate having a plurality of filtering holes in a two-stage shape, wherein the upper plate includes projections arrayed at a predetermined interval and press-fitted to upper ends of the second filter plates and assembled to an upper part, and the lower plate includes projections arrayed at a predetermined interval and press-fitted to lower ends of the second filter plates and assembled to a lower part; and coupling members coupling the upper plate and the lower plate to the closed surfaces, fixing the first filter plates and the second filter plates in and to the body.