Patent ID: 7306730
Filing Date: 2007-12-11
Classification: B04C,B23Q,Y02P

Abstract:
1. A cyclone-type separator for separating solid foreign matter from liquid, comprising: a hollow cylindrical main body which has a discharge port in a lower end; an inlet port which introduces the liquid into the main body, causing the liquid to swirl in the main body, said liquid containing solid foreign matter; a clean room which is provided in an upper end of the main body; and a communication pipe which connects the clean room to an interior of the main body, wherein the foreign matter contained in the liquid is separated by virtue of a centrifugal force as the liquid swirls in the main body, and the foreign matter thus separated is made to fall along an inner surface of the main body and is discharged through the discharge port; a columnar air layer is generated, which is aligned with a centerline of an eddy stream generated due to the swirling of the liquid and which flows from the discharge port to the clean room through the communication pipe, a clean liquid layer is formed, which is free of the foreign matter and which rises along a circumferential surface of the columnar air layer, and the clean liquid is discharged from the clean room after having been guided into the clean room along the circumferential surface of the air layer, wherein a porous separating pipe is arranged in the clean room and connected to the communication pipe, and there are provided a first reservoir provided on a bottom of the clean room, surrounding the separating pipe and configured to store temporarily the liquid flowing the separating pipe, a second reservoir configured to store temporarily the liquid flowing from the first reservoir, and a liquid outlet port which opens below a surface level of the liquid stored in the second reservoir.