Micro force switch valve with check function

Abstract

The invention relates to a valve, in particular to a micro force switch valve with check function. It solves the technical problem that the current micro force valve does not have the automatic check function. A micro-force switching valve with check function, including a valve body, a piston cylinder, an inlet chamber, and an outlet chamber. An inlet in the valve is set between the inlet chamber and the outlet chamber; the disc at the lower end of the valve stem is connected to the inlet in the valve. The opening and closing cooperation is set, the upper piston is slidingly matched with the inner wall of the piston cylinder, there is a channel hole inside the valve stem, and an inlet and outlet through hole is opened on the lower end cover at a position other than the central hole, which can connect the micro flow between the outlet cavity and the upper piston cavity There is a micro-force valve plug with a knob on the top; the side wall of the valve stem has a side outlet communication channel hole and the upper piston chamber below the upper inlet of the valve stem, and a valve stem valve plug with a side outlet for opening and closing slides in the channel hole; the piston A spring is connected between the upper part and the lower end of the valve cover. The valve has an automatic check function, and is light and labor-saving, easy to locate, reliable in performance, and not easy to rust.

Description

technical field [0001] The invention relates to a valve, in particular to a micro force switch valve with check function. Background technique [0002] At present, most of the valves used to control fluid flow in the market are switched by the hand wheel to drive the valve stem up and down. The disadvantages are that it is troublesome to open and close, the number of rotations is large, the operation intensity is high, and the larger the valve caliber, the hand wheel Also bigger, switch time-consuming and laborious. In the prior art, the invention patent application with the publication number CN103322207A discloses a micro-force switch valve, which can adjust the opening and closing of the valve with a very small force, but this valve has an obvious shortcoming, that is, it can be opened and closed during the process. When the water flow at the orifice suddenly stops, the opening and closing of the valve will not be effectively controlled, and the water in the outlet pipe ...

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