Flushing device for automatic flushing of an empty liquid storage space, in particular a rainbow or a sewer storage space

摘要

Arranged in a liquid-storage area (2), e.g. a stormwater-retention tank, there is a flushing chamber (21) with a flushing opening from a siphon-type flow channel (24) which is configured such that the storage liquid located in the flushing chamber (21) is held back by atmospheric air pressure when the liquid level in the storage area (2) drops. In the top (33) of the flushing chamber (21) there is located an air-inlet (34) which can be closed by an aerating valve (35). The aerating valve (35) comprises a pressure meter with a diaphragm which deforms when subjected to compressed air and closes the air-inlet opening. A vacuum fan (36) is connected to the flushing chamber (21) by means of a suction line (37) and to the aerating valve (35) by means of a pressure line (40). By means of the vacuum fan (36), first of all the aerating valve (35) is closed, the flushing chamber (21) is, furthermore, evacuated and thus filled with flushing liquid. Actuating a solenoid valve (56) permits a pressure compensation which makes it possible for air to enter into the flushing chamber (21) and thus triggers a flushing surge. IMAGE