Magnetic connecting shaft type hand cranking small-flow LNG filling pump

The invention provides a magnetic connecting shaft type hand cranking small-flow LNG filling pump. The magnetic connecting shaft type hand cranking small-flow LNG filling pump comprises a rotating plate, a first drive impeller, a second drive impeller, a magnetic coupler, a first permanent magnet, a second permanent magnet, a thread rod, a first baffle and a second baffle; the second drive impeller is arranged on the rear side in the pump body, the first drive iempller is arranged on the front side in the pump body, the magnetic coupler is arranged on the lower end face of the pump body, the first permanent magnet is arranged in the pump body, and the second permanent magnet is arranged in a drive force transmission system. Due to design, the problem that an original small flow LNG fillingpump is vacant is solved, the first baffle is arranged on the annular side face in a liquid inlet, the second baffle is arranged in the middle of the first baffle, a rotating plate is arranged on theupper side of the outer s