Patent ID: 8006716

Claim:
A parent-and-subsidiary flow-guided floating valve, comprising: a parent valve having a body being a symmetrical planar figure with a central axis line as a symmetrical line, the central axis line pointing to an overflow cofferdam along a direction in which a liquid flows; at least two legs below the body of the parent valve, with a front leg being longer than a rear leg so that a 2-10 degree angle opens between the body of the parent valve; a valve orifice toward the overflow cofferdam when the parent valve is fully open, wherein the body of the parent valve includes a parent valve hole; a subsidiary valve positioned above the parent valve hole, the subsidiary valve being a movable valve having a body, the body of the subsidiary valve having an area 30% to 60% of the area of the body of the parent valve; and a guide hole positioned on the body of the parent valve, wherein a guide plate is located on the guide hole, further wherein the guide hole is shaped like a tongue, rising 2 mm in height from the body of the parent valve, and fixed at one end of the guide hole; wherein at least two subsidiary legs under the body of the subsidiary valve have a front leg being longer than a rear leg so that a 0-10 degree angle opens between the body of the subsidiary valve and the body of the parent valve toward the overflow cofferdam when the subsidiary valve is fully open; wherein the body of the parent valve has a length of 70 mm and a maximum width of 30 mm; wherein the front leg of the parent valve is 14 mm in length and the rear leg of the parent valve is 13 mm in length; wherein the body of the subsidiary valve has the same shape as the body of the parent valve, and has a length of 35 mm and a maximum width of 15 mm; wherein the front leg of the subsidiary valve is 7 mm in length and the rear leg of the subsidiary valve is 6 mm in length.