One-way sealing ball valve

Abstract

The embodiment of the invention discloses a one-way sealing ball valve. A spherical part of a spherical valve is provided with a through hole and spherical sealing surfaces located on the two sides ofthe through hole. The end, in contact with a spherical valve, of a sealing ring is of a spherical structure. The sealing ring is a sealing ring formed by a fluoroplastic material and is used for forming a sealing pair with the spherical valve. A boss is arranged at the other end of the sealing ring. A pipe joint comprises a joint end and a support end. One end of a spring abuts against the end, with the boss, of the sealing ring. The support end of the pipe joint is attached to the boss of the sealing ring. A sleeve at the support end is embedded into the outer side of the spring and enablesthe other end of the spring to abut against the inner wall of the sleeve at the support end, and a shell is embedded into the outer sides of the spherical valve, the sealing ring and one side of the support end of the pipe joint. According to the one-way sealing ball valve, on the premise of not reducing the functional performance and reliability of the ball valve, the effect of reducing the product cost by replacing the bidirectional sealing structure with the one-way sealing structure is achieved, and meanwhile, the problem of rubber cutting of a traditional ball valve is solved.

Description

technical field [0001] This application relates to but not limited to the technical field of aviation fuel ball valves, especially a one-way sealing ball valve. Background technique [0002] The traditional ball valve forms a sealing pair through the rubber sealing ring and the spherical valve. Since the aircraft fuel system (in contact with the fuel) cannot be coated with grease, the sealing ring is prone to rubber cutting during the rotation of the spherical valve; The self-tightness is reduced, and on the other hand, redundant objects are formed. The ball valve itself becomes an uncontrollable source of pollution, which brings uncertain risks to the aircraft fuel system. [0003] Due to the phenomenon of rubber cutting in traditional ball valves, which leads to low sealing reliability, a two-way sealing structure is usually used at present, thereby reducing product cost and product weight. Contents of the invention [0004] In order to solve the above technical problem...

AI Technical Summary

Problems solved by technology

[0002] The traditional ball valve forms a sealing pair through the rubber sealing ring and the spherical valve. Since the aircraft fuel system (in contact with the fuel) cannot be coated with grease, the sealing ring is prone to rubber cutting during the rotation of the spherical valve; The self-tightness is reduced, and on the other hand, redundant matter is formed, and the ball valve itself becomes an uncontrollable source of pollution, which brings uncertain risks to the aircraft fuel system

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