Chemical agent feeding device for sewage treatment

The utility model belongs to the technical field of mixing, and particularly relates to a chemical agent feeding device for sewage treatment, which comprises a feeding mechanism, a protective seat arranged on the lower side of the feeding mechanism, an eduction tube rack mounted on the protective seat, and a mixing mechanism. A mixing stirring shaft is driven to stir and mix sewage and chemical agents in the mixing box through meshing transmission of a mixing worm and a mixing worm wheel, and meanwhile, a mixing overturning frame is overturned in the mixing box through pushing of a mixing convex ring to a mixing ejector rod; then, the sewage and the chemical agent positioned on the inner wall of the mixing box are turned to the central position, so that the mixing of the whole sewage and the chemical agent is accelerated. 本实用新型属于混合技术领域，特别是涉及一种污水处理用化学药剂投放装置，包括投放机构，投放机构下侧设置有防护座，防护座上安装有导出管架，还包括混合机构。通过混合蜗杆和混合蜗轮的啮合传动来带动混合搅拌轴对混合箱内部的污水和化学药剂进行搅拌混合，同时还通过混合凸型环对混合顶杆的顶推让混合翻转架在混合箱内部进行翻转，随即来将位于混合箱内壁位置的污水和化学药剂向中心位置翻动，继而来加快整