The invention provides a mechanical type automatic
water saving device. The mechanical type automatic
water saving device comprises a self-
operating temperature controlling device, an automatic
pulse flow washing device and a stopping device, wherein the self-
operating temperature controlling device, the automatic
pulse flow washing device and the stopping device are mounted in a valve body, the self-
operating temperature controlling device comprises a temperature
bulb, a
valve stem and a
sluice valve plate, the automatic
pulse flow washing device comprises an
impeller which is connected with a stop plate via a connection rod, the stop plate is a movable structure, a tangential direction of the
impeller is positioned at the position of a
water flow direction at a water inlet, the stopping device comprises a hand wheel, a stop valve, a stop valve bonnet and a valve flap, the hand wheel is fixed at the top end of the stopping
valve stem which is a movable structure, the bottom end of the stopping
valve stem penetrates the stopping valve bonnet and is connected with the valve flap, the valve flap faces a
valve seat in position and is sealed with the
valve seat. The mechanical type automatic
water saving device is simple in structure and capable of efficiently controlling
water flow rate automatically according to temperature of circulating water and utilizing pulse
water flow to wash pipelines so as to prevent same from scaling.