Electromagnetic valve

Abstract

The invention discloses an electromagnetic valve belonging to the field of valves and comprising a main valve and a pilot valve, wherein the main valve comprises a valve seat, and a piston accommodated in an inner cavity of the valve seat; the valve seat is provided with an input hole, an output hole and a pilot valve installing hole which are communicated with the inner cavity; the lower end part of the piston is sealed and covered on the output hole, the upper end part of the piston is provided with a groove, the bottom of the groove is provided with a piston valve hole communicated with the output hole; the pilot valve comprises a spring, a coil, a guide sleeve arranged on the pilot valve installing hole, a static iron core and a movable iron core, wherein the static iron core and the movable iron core are respectively arranged at the upper end and the lower end of an inner cavity of the guide sleeve, the coil is sleeved on the outer surface of the guide sleeve, the lower port of the guide sleeve is provided with a limit baffle ring, the lower end part of the movable iron core penetrates through a valve hole of a sealing piston of the limit baffle ring, the movable iron core is provided with an axial step through hole and a transverse hole which are penetrated, and the spring is arranged at the upper section of the step through hole and abuts and supports against the static iron core. The electromagnetic valve is characterized in that a transverse groove is arranged on the lower end face of the limit baffle ring, thus medium channel area between the input hole and the groove is reduced, valve-opening capacity is improved and energy-saving effect is realized.

Description

technical field [0001] The invention belongs to the field of valves, and in particular relates to an electromagnetic valve. Background technique [0002] The invention patent application document with the application number of 200810096924.0 discloses a solenoid valve, which includes a valve seat with a rotary inner cavity, a piston that can move axially in the inner cavity of the valve seat, and the valve seat A guide sleeve connected at one end, a static iron core matched with the guide sleeve, a moving iron core capable of reciprocating axially in the guide sleeve, and a moving iron core and a static iron core located inside the guide sleeve The spring between; the valve seat is provided with a main valve port, the static iron core is fixedly connected with the guide sleeve, one end of the guide sleeve tube for fixing the static iron core is an open structure, and the other end has The lower end of the valve seat has an outlet pipe interface, and its side wall is also p...

AI Technical Summary

Problems solved by technology

The larger the cross-sectional area of ​​the axial through hole at the center of the piston, the greater the power of the coil that drives the moving iron core to move upward, and the greater the energy consumption. Due to the existence of the balance

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