Quantitative discharging device

The utility model provides a quantitative discharge device, which comprises a quantitative container, a discharge pipe and a discharge pipe, the volume control part comprises a floating part arrangedin the quantitative container, and the floating part moves in the containing cavity to control the volume of the containing cavity; and the feeding and discharging control part comprises a feeding valve and a discharging valve which are arranged on the quantitative container and are respectively used for controlling feeding into the accommodating cavity and discharging from the accommodating cavity. According to the quantitative discharging device, the size of the containing cavity of the quantitative container is adjusted through the floating piece, the opening and closing states of the feeding valve and the discharging valve are controlled through the feeding and discharging control component, the medium mass in the quantitative container is in a controllable state, and quantitative discharging is achieved. 本实用新