Flow detector used for liquid circulation pipeline

The invention discloses a flow detector used for a liquid circulation pipeline. The flow detector used for the liquid circulation pipeline comprises a main body, wherein a flow switch and an electric controller are arranged in the main body; the main body is hinged with a movable vane made of an anti-corrosion material via an articulated shaft; the movable vane is provided with a control magnet by corresponding to the electric controller; the articulated shaft is a titanium articulated shaft. The flow detector used for the liquid circulation pipeline also comprises a reset device for resetting the movable vane. The flow detector used for the liquid circulation pipeline, which is disclosed by the invention, is used for hinging the movable vane and the main body of the detector, the damage risk is omitted, the reliability of the detector has a better longevity, and the manufacture of the detector is simplified due to the fact that the damage risk of a metal part in the traditional detector does not need to be c