Valve head for pulse solenoid valve

Abstract

The invention discloses a valve head for a pulse solenoid valve. The valve head comprises a coil frame, a static iron core component and a moving iron core component, wherein the coil frame is provided with a through hole which penetrates through the upper and lower surfaces of the coil frame; the static iron core component comprises an upper permanent magnet and an upper static iron core, the upper permanent magnet and the upper static iron core which are mutually sucked are arranged at the upper port of the through hole of the coil frame from top to bottom in sequence; the moving iron core component is flexibly arranged in the through hole on the coil frame in a mode that the upper port of a pressure relief hole on the valve body of the solenoid valve is closed by a moving-down mode and opened by a moving-up mode; the static iron core component also comprises a left permanent magnet and a right permanent magnet; the left permanent magnet and the right permanent magnet are respectively arranged on the left side and right side of the moving iron core component; and the magnetic poles of the left permanent magnet, the right permanent magnet and the permanent magnet are oppositely arranged, and a decompression nozzle is arranged in the through hole of the coil frame. The valve head for the pulse solenoid valve provided by the invention has the advantages that bistable state self-maintenance in the states of opening and closing of the valve head can realized through a magnetic field, thus the stability performance is high.

Description

technical field [0001] The invention relates to a solenoid valve assembly, in particular to a valve head of a pulse solenoid valve. Background technique [0002] Pilot-operated solenoid valves are mainly used in automatic control systems where the medium is water, such as induction sanitary ware, IC water meters, etc. For example, the utility model with the application number 200620010122.X discloses "a miniature high-efficiency DC bistable pulse solenoid valve", which includes a valve body, a valve core assembly and an electromagnet assembly. The valve body is divided into an upper part and a lower part by an intermediate body. The electromagnet assembly is installed on the upper part of the valve body, and the valve core assembly is installed on the lower part of the valve body. The lower part of the valve body is divided into the inlet fluid chamber, the outlet fluid chamber and the valve core chamber by the valve core assembly. The inner cavities of the spool are conne...

AI Technical Summary

Problems solved by technology

[0005] 1. When the solenoid valve is in the open state, the moving iron and the static iron core are self-maintained under the magnetic force of the permanent magnet; when the solenoid valve is in the closed state, the moving iron and the static iron core are separated and self-maintained under the elastic force of the spring; When the water pipe vibrates or the water pressure changes too much, the moving iron is easy to attract with the static iron core, and it is easy to stop the water flow; in order to maintain stability, there are usually two methods, one is to strengthen the spring force, and the other is to increase the spring force. The gap between the moving iron and the static iron core requires a greater electromagnetic force to open the solenoid valve, and this needs to be realized by increasing the coil or inputting a larger pulse current. This structure not only consumes power but also requires increase;

[0006] 2. Due to the fixed connection between the moving iron and the sealing fluid head, the stroke of the moving iron will also change under the condition of water pressure changes and aging of the sealing fluid head, which reduces the stability of the valve head

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