Novel operating valve for railway wagon

Abstract

The novel operating valve comprises a valve seat and a nylon valve element, an air outlet hole is formed in the valve seat, an air cylinder front air hole, an air cylinder rear air hole and a closed air hole are evenly distributed in the periphery of the air outlet hole, the lower end of the nylon valve element is rotationally connected with the valve seat, and an annular groove is formed in the side wall of the nylon valve element; a first connecting hole is formed in the lower end of the nylon valve element, a second connecting hole, a third connecting hole and a fourth connecting hole are evenly distributed in the outer circumference of the first connecting hole, and the second connecting hole and the third connecting hole form a V-shaped gas circuit with the first connecting hole through a first through hole and a second through hole respectively. Meanwhile, the nylon valve element solves the problems that the nylon valve element exerts overlarge pressure on the valve seat and the contact face is abraded too fast through the air charging groove, reliability of the operating valve is improved, the service life of the operating valve is prolonged, and manufacturing and repairing cost is reduced; and only the rubber sealing structure needs to be replaced during maintenance, so that the maintenance efficiency is also improved.

Description

technical field [0001] The invention belongs to the technical field of railway freight car control systems, and more particularly relates to a novel control valve for railway freight cars. Background technique [0002] The control valve is a four-position five-way valve, which is the control switch of the bottom door of the hopper car wind control device. It is the key component of the wind control device. Door opening and opening and closing control. Existing control valves are divided into two types: threaded connection and flange connection according to the connection method. The first generation of threaded connection control valve was designed in the 1960s, and the second generation of flange connection structure has also been used for nearly ten years. Grinding surface rubber sealing structure. [0003] Among them, the sealing plate and nylon valve core are the core parts of the rubber sealing structure. The scratch rate of the sealing plate and nylon valve core is 1...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new type of control valve for railway wagons in view of the deficiencies in the prior art. The new type of control valve is sealed by a nylon valve core and a rubber sealing structure. For the problem of excessive pressure on the valve seat and excessive wear of the contact surface, the reliability and service life of the control valve are improved, and the cost of construction and repair is reduced; only the rubber sealing structure needs to be replaced during maintenance, and the maintenance efficiency is also improved

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