Open cooling tower of metal casing

The utility model discloses an open cooling tower of metal casing. Open cooling tower of metal casing includes the tower body, device and two aproll devices induced draft, the both sides of tower bodyare equipped with the air intake, device and two the aproll devices of induced drafting are all established at the top of tower body, just two aproll unit bit in both sides of the device that induceddrafts, the aproll device includes aproll groove, filter -tank and sealed apron, the filter -tank is established at the aproll inslot, sealed apron is used for sealed aproll groove and filter -tank,sealed apron on the filter -tank is equipped with into water interface, be equipped with the clearance between filter -tank and the aproll groove, the aproll inslot is equipped with the hole that leaks, the downthehole annular isolating pad that is equipped with leaks, annular isolating pad's top surface is higher than the interior bottom surface in aproll groove. The utility model discloses opencooling tower of metal casin