Pollution-prevention vacuum emulsion pump

The utility model relates to a pollution-free vacuum emulsion pump which is used for the packing bottle to contain the emulsion for the production of daily chemical articles. The emulsion pump includes a press head (1), a bottle cap (2), a pump body (3), a plunger (4), a K-shaped plunger lock ring (5), a return spring (6), a non-return valve glass ball (7); The press head has an inner tube, the inner cavity is a shoulder hole, the upper part of the inner cavity is small and the lower part of the inner cavity is big, the upper end is communicated with a lateral nozzle, and an annular groove (11) is arranged in the middle; the bottle cap is opened with a hole and is matched with the inner tube of the press head in a sliding way; the pump body is arranged under the bottle cap, a non-return valve is arranged under the pump body; the plunger takes the shape of the cylinder, the outer diameter of which is matched with the inner tube cavity of the press head and has a convex ring (41) to buckle with the annular groove (11), and the lower part is opened with a by-pass opening (44); The inner edge of the K-shaped plunger lock ring is arranged between the plunger and the larger shoulder hole in the lower of the inner tube of the press head and can slide; the return spring is arranged between the press head and the bottle cap. The utility model can prevent the pollution to the emulsion due to the direct contact of the spring with the emulsion in the bottle, and at the same time the utility model has the advantages of simple structure, little parts and easy assembly and the low cost. 一种适用于盛装日用化工乳液的包装瓶上的无污染真空乳液泵，包括按头(1)、瓶盖(2)、泵体(3)、柱塞(4)、K形柱塞密封圈(5)、复位弹簧(6)、单向阀玻球(7)；按头有内管，内腔为上小下大阶梯孔，上端通横向喷口，中部有环形凹槽(11)；瓶盖中开有孔并与按头内管滑配；泵体装在瓶盖下，其下部装单向阀；柱塞为筒体，外径与按头内管腔相配并有凸环(41)与环形凹槽(11)相扣合，下部开有旁口(44)；K形柱塞密封圈的内边沿装在柱塞与按头内管下部大的阶梯孔之间并可滑动；复位弹簧装在按头与瓶盖之间。本实用新型既可防止弹簧与瓶内的乳液直接接触和乳液的被污染，同时结构简单，零部件少，装配简便成本低。