Reversing sealing device of low-temperature-resistant combined ring spacer sleeve valve rod forming valve

Abstract

The invention discloses a reversing sealing device of a low-temperature-resistant combined ring spacer sleeve valve rod forming valve. An electromagnetic pilot valve is arranged on one side of a valvebase, a piston is arranged inside an air inlet cavity, a valve body is arranged on one side of the valve base, a valve rod is arranged inside a working cavity, and one end of the piston is installedin a first inserting groove; a plurality of spacer sleeves are arranged on one side of the outer part of the valve rod, and a boss is arranged in the middle of one side of the two end surfaces of thespacer sleeves; a low-temperature-resistant combined ring is arranged between every two adjacent spacer sleeves, outer rings and lip edges are integrally formed, grooves matched with the bosses are formed between the outer rings and the lip edges, and one side of a valve body is provided with an end cover. According to the device, two end faces of the low-temperature-resistant combined ring are designed into groove structures correspondingly, and two end faces of the spacer sleeves are designed to be of boss structures; the running resistance at the moment of reversing the valve rod is reduced, meanwhile, the sealing performance of the electromagnetic reversing valve is not reduced after the reversing is completed, then the low-pressure starting and reversing performance of the electromagnetic reversing valve are further reduced, and the electric control reversing performance of the electromagnetic reversing valve is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic reversing valves, and in particular relates to a reversing sealing device for a valve stem constituting a low-temperature resistant combined ring spacer. Background technique [0002] Electromagnetic reversing valve is a control valve that uses the suction force of an electromagnet to push the spool to move to change the direction of fluid flow. It is an automatic basic component used to control fluid. It belongs to the actuator and is not limited to hydraulic and pneumatic. It is used to adjust the direction, flow, speed and other parameters of the medium in the industrial control system. In order to ensure the sealing performance of the solenoid valve in the existing electromagnetic reversing valve, an O-shaped sealing ring is usually provided on the outer periphery of the valve stem; the sealing performance of the solenoid valve is generally controlled by the interference between the O-...

AI Technical Summary

Problems solved by technology

In order to ensure the sealing performance of the solenoid valve in the existing electromagnetic reversing valve, an O-shaped sealing ring is usually provided on the outer periphery of the valve stem; the sealing performance of the solenoid valve is generally controlled by the interference between the O-shaped sealing ring and the valve stem , in the actual use process, when the interference between the sealing ring and the valve stem is large, the sealing performance of the solenoid valve can be guaranteed, but the instantaneous resistance of the valve stem will increase correspondingly when the solenoid valve changes direction, resulting in a load on the solenoid coil. If the commutation is unsuccessful, the electromagnetic coil will be energized for a long time, generate heat, or even burn out, especially when used in the cold environment in the north; if the interference between the sealing ring and the valve stem is large Hours, the instantaneous reversing resistance of the valve stem will decrease, but it will also cause the problem of the sealing of the reversing valve; in order to solve the contradiction between the instantaneous reversing resistance of the reversing valve stem and the sealing reliability of the sealing ring, we have developed A reversing sealing device for a low temperature resistant combination ring spacer valve stem constitutes a valve

Images