A refueling main pipe system and its aircraft pressure refueling assembly and aircraft

Abstract

The invention discloses a refueling manifold system and an aircraft pressure refueling assembly with the same and an aircraft. The refueling manifold system comprises a refueling manifold (1), a refueling branch (3), an emergency defueling branch (4) and a check valve (5), wherein the refueling manifold (1) penetrates through a fuel tank (2), the refueling manifold (1) enters the fuel tank (2) from a first wallboard (21) of the fuel tank (2), and extends out of the fuel tank (2) from a second wallboard (22) of the fuel tank (2); the refueling branch (3) is arranged at a position, located in the fuel tank, of the refueling manifold (1); the check valve (5) is arranged at a position, located in the fuel tank, of the refueling manifold (1), and adjacent to the first wallboard (21). The check valve of the refueling manifold (1) of the refueling manifold system disclosed by the invention is arranged at a position, located in the fuel tank, of the refueling manifold and adjacent to the first wallboard, so that fuel in a pipeline in front of the check valve can be completed discharged.

Description

technical field [0001] The invention relates to the field of aviation technology, in particular to a refueling main pipe system, a pressure refueling assembly for aircraft with the same and an aircraft. Background technique [0002] The position of the fuel tank in the fuel system of a large aircraft is relatively high, the position of the refueling joint is low, the refueling pipeline is long, and the emergency oil discharge pipeline in the fuel tank and the refueling pipeline share the same main pipe, and there is a lot of residual oil in the pipeline after refueling. The traditional fueling main pipe residual oil discharge is: there is no fueling one-way valve between the inner and outer pipelines of the fuel tank. The disadvantage is that after the residual oil is discharged through the refueling joint, when the fuel tank is full, the fuel in the fuel tank will enter the refueling main pipe through the emergency oil drain pipeline in the fuel tank, resulting in incomplet...

AI Technical Summary

Problems solved by technology

The disadvantage is that after the residual oil is discharged through the refueling joint, when the fuel tank is full, the fuel in the fuel tank will enter the refueling main pipe through the emergency oil drain pipeline in the fuel tank, resulting in incomplete discharge of residual oil in the main pipe and increasing the amount of dead oil in the pipeline and additional aircraft weight

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