Petroleum dosing and pumping device

The utility model relates to the field of petroleum dosing, in particular to a petroleum dosing pumping device which comprises a main pump and an auxiliary pump which are assembled on a mounting seat, a main pump valve body and an auxiliary pump valve body are respectively arranged between the main pump and the mounting seat and between the auxiliary pump and the mounting seat, and a check valve body is arranged between the main pump valve body. The petroleum dosing pump solves the problem that in the petroleum dosing and pumping process, the precision of medicine quantity is insufficient, all the components are connected in an assembled mode, no welding area exists, and residual deformation caused by residual stress is not generated; according to the utility model, the backflow of medicine in the pumping device can be effectively prevented, and the dosage can be accurately controlled. 本实用新型设计石油加药领域，尤其涉及一种石油加药泵送装置，包括装配于安装座上的主泵和副泵，主泵和副泵分别与安装座之间设置有主泵阀体和副泵阀体，主泵阀体之间设有止回阀体。本实用新型解决了石油加药泵送过程中药量精度不足的问题，本实用新型所有部件均为组装连