A device for changing weighting method calculation basin face rainfall

The utility model relates to a device for changing weighting method calculation basin face rainfall, header tank, water catch bowl, metal drain pipe, drain valve and support column, the upper end of support column is connected with the bottom of header tank, and the bottom of header tank is equipped with the wash port, and the metal drain pipe is connected with the wash port, the water catch bowlis installed on the header tank, still includes controller, universal wheel and apron, and the lower extreme at the support column is installed to the universal wheel, and the apron is installed at the top of water catch bowl, and the outer wall of header tank is equipped with the observation window, is equipped with the scale mark on the header tank, this scale mark and observation window cooperation, the apron is including left side apron and right side apron, and the one end of left side apron and the left end of water catch bowl are articulated through turning left the axle, and the otherend of left side apron is