Pressure retaining valve used for automobile tire inflation and deflation system

Abstract

The invention discloses a pressure retaining valve used for an automobile tire inflation and deflation system. The pressure retaining valve comprises a valve deck, a valve body, a valve seat, a first conical spring, a membrane piece, a gasket, a first O-shaped ring, a silencer, a nozzle, a rubber blanket, a second conical spring, a second O-shaped ring, a movable iron core, a stationary iron core, a third O-shaped ring, a wiring harness plug and an electromagnetic coil; the valve deck is installed on the valve body, the valve seat is installed at the bottom of the valve body, the membrane piece is installed below the valve deck, the first conical spring is installed at the position of the membrane piece, the gasket is installed below the membrane piece, the movable iron core is installed below the nozzle, the second conical spring is installed at the position of the nozzle, the rubber blanket is installed at the top of the movable iron core, the stationary iron core is installed at the bottom of the movable iron core, and the silencer is communicated with the bottom of the stationary iron core through an air flue. According to the pressure retaining valve, the reliability is good, the membrane piece is adopted for controlling the opening and closing of a gas port, compared with a piston type valve, the durability is better, the high temperature resistance and the low temperature resistance are better, and no lubrication is needed; a solenoid valve is adopted for conducting pilot control to an air chamber over the membrane piece, the power is low, and the energy consumption is little.

Description

technical field [0001] The invention belongs to the field of valves, in particular to a pressure maintaining valve for an automobile tire inflation and deflation system. Background technique [0002] When inflating and deflating car tires through the air channel in the axle, in order to avoid the air channel in the axle still having air after the inflation and deflation is completed, it is necessary to quickly empty the air pressure in the air channel in the axle. Allowing the air passage of the axle to be at atmospheric pressure can effectively improve the service life of the rotating sealing ring in the air passage of the axle. [0003] The existing automobile charging and discharging pressure maintaining valve adopts a piston structure, which has poor reliability and low service life. Contents of the invention [0004] The purpose of the embodiments of the present invention is to provide a pressure maintaining valve for an automobile tire inflation and deflation system...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide a pressure maintaining valve for automobile tire inflation and deflation system, which aims to solve the problems that the existing automobile inflation and deflation pressure maintenance valve adopts a piston structure, has poor reliability and low service life

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