The invention belongs to the field of
cut-off devices, and particularly relates to a transverse pull type three-stage
flap valve and an operation method thereof. The transverse pull type three-stage
flap valve comprises a water outlet
pipe, a water outlet
pool rear wall, a motor, a sliding rail, a
flap valve, a rotating shaft, a fixing groove, a
piezoelectric sensor, a gearbox and a series of rod pieces. The transverse pull type three-stage flap valve is installed at a water outlet of the round water outlet
pipe and is composed of two first-stage fan-shaped flap valves, a round second-stage flap valve and a third-stage flap valve, the first-stage flap valves are installed in the second-stage flap valve through the rotating shafts, the second-stage flap valve is installed in the third-stage flap valve through rotating shafts, and the third-stage flap valve is installed on the rear wall of the water outlet
pool through the series of rod pieces. According to the transverse pull type three-stage flap valve, automatic opening and closing of the flap valve are achieved mainly through operation of the motor and transmission of the series of rod pieces, graded free outflow can be achieved, it can be guaranteed that the
impact force of the flap valve on the water outlet
pipe is close to zero when the flap valve is closed, and then safety and stability of the water outlet pipeline are guaranteed.