Double-acting hydraulic polytetrafluoroethylene diaphragm pump

The invention relates to the technical field of diaphragm pumps, and discloses a double-acting hydraulic polytetrafluoroethylene diaphragm pump which comprises a pump body, a piston and two conveying units, a piston rod channel and a piston cylinder for reciprocating motion of the piston are arranged in the pump body, the two conveying units are symmetrically arranged along the axis of the piston cylinder, the two conveying units share one pump body, and the piston rod channel is communicated with the piston cylinder. Each conveying unit comprises a pump cover, a double-layer diaphragm is installed between the pump cover and the pump body, the double-layer diaphragm, the pump cover and the pump body form a diaphragm chamber, the double-layer diaphragm and the pump body form a hydraulic chamber, the two ends of the double-layer diaphragm are provided with pressure taking devices used for pressure alarming, and an oil channel communicated with the piston cylinder is formed in the pump body. The pump body is pro