MODULAR FUEL TRANSFER PUMP FLOW PASSAGE STRUCTURE AND FUEL TRANSFER PUMP

The present invention provides a modular fuel transfer pump flow passage structure, which comprises an oil inlet bellows, a lead sealing plug, an adapter, an air vent valve and an oil outlet bellows, wherein the two ends of the adapter are respectively equipped and fixed with the oil inlet bellows and the oil outlet bellows by using fasteners; an oil inlet pipe of the oil inlet bellows is fixedly mounted on the adapter; the end wall surface in the axial direction of the adapter is provided with a vent hole; an air vent valve equipped with a vent cap is arranged outside the vent hole; the adapter is fixedly provided with an oil outlet pipe of the oil outlet bellows, the end wall surface in the axial direction of the adapter is provided with a through hole, the lead sealing plug is installed in the through hole, the inner cavity wall of the fastener is opposite to the structure of the bellows, and a corrugated structure for wedging and fixing is integrally formed, and the outer walls at both ends of the adapter are integrally formed with annular bosses for the fastener to be fixedly installed; the present invention further provides a fuel transfer pump, which has a modular fuel transfer pump flow passage structure.