Metal seal quickly-detaching one-way valve for airplane

Abstract

The invention belongs to the technical field of airplane fuel systems and relates to a metal seal quickly-detaching one-way valve for an airplane. According to the metal seal quickly-detaching one-way valve for the airplane, one end of a valve assembly shell (1) is connected with a valve assembly connector (7) through a flange. The joint is sealed through a rubber mat (8). The other end of the valve assembly shell is in butt joint with one end of a convex connector (4) through a quickly-detaching hoop (3). The butt joint position is sealed through an O-shaped sealing ring (2), and the other end of the convex connector (4) is welded to a pipeline. A valve (5) is installed on the valve assembly connector (7) through a screw and a torsional spring (6), the valve (5) is sealed in a normally-closed mode, and initial sealing pretightening force is provided by the torsional spring (6). The defects in the prior art are overcome, the workload of maintenance staff for detaching and installing the one-way valve can be greatly relieved, the product service life is prolonged, the use maintainability of the system is effectively improved, and use cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of aircraft fuel systems, and relates to a metal-sealed quick-release check valve for aircraft. Background technique [0002] The one-way valve of the aircraft fuel system is installed in the fuel system pipeline to control the flow direction of the fuel medium to ensure that the fuel is transferred according to the predetermined flow direction. [0003] With the continuous development of aviation advanced concepts and technologies, modern aircraft design has higher and higher requirements for the reliability and maintainability of fuel systems. Therefore, the development of quick-release one-way valves will become a trend. [0004] The diameter of the traditional normally closed flap check valve is generally Below 30mm, when the fluid medium passes through the valve, the valve flap moves upward under the impact of the positive fluid medium, the valve passage is opened, and the fluid medium flows downstre...

AI Technical Summary

Problems solved by technology

The two ends of the valve are mostly connected to the pipeline with standard rubber hoses. Due to the short life of the rubber hose, maintenance personnel need to replace it regularly. When replacing the one-way valve, it is necessary to use a special wrench to remove the four bolts first. Cut the rubber hose with a knife before removing the one-way valve, which risks damaging the surface of the connected conduit or valve

In addition, because the flap is reset by its own weight, there are strict restrictions on the installation angle of the one-way valve. In addition, the space on the aircraft is limited, which makes the use and maintainability of the one-way valve worse, and the maintenance cycle is longer. Increased maintenance costs

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