Quantitative feeding structure for pulping waste liquid pretreatment

The utility model discloses a quantitative feeding structure for pulping waste liquid pretreatment, which belongs to the technical field of pulping waste liquid, and is characterized in that the quantitative feeding structure comprises a feeding pipe, and a quantitative feeding mechanism for treating waste is arranged above the feeding pipe; during use, a first motor is connected with an external power source, then the reactants are placed in a cylinder, at the moment, the reactants are blocked by a blocking cone, then the first motor is started, the first motor drives an eccentric wheel to rotate, the eccentric wheel is driven by the eccentric wheel to rotate, and the reactants are prevented from being blocked by the blocking cone. When the eccentric wheel rotates, the eccentric wheel collides with the extension plate to enable the blocking cone to descend, then the spring shrinks, when the eccentric wheel does not make contact with the extension plate, the spring drives the blocking cone to reset, the proce