Actuator check valve

Abstract

The invention provides an actuator check valve. The actuator check valve comprises a valve body; an inlet and an outlet are formed in the two sides of the valve body; a valve cavity is arranged in thevalve body; a valve seat is arranged at the junction of the inlet and the valve cavity; the interior of the valve cavity is hinged with a valve clack which can be opened in a swing manner along a hinged joint; a hinge shaft is arranged in the valve body; the hinge shaft and the valve clack are fixedly connected to make the valve clack drive the hinge shaft to rotate when the valve clack is opened; one end of the hinge shaft extends to the exterior of the valve body; an actuator is arranged outside the valve body; the actuator is provided with an output shaft; the hinge shaft and the output shaft are coaxially arranged; sector slots formed in the circumferential direction of the hinge shaft are formed in the outer edge of the end face of one end, facing towards the output shaft, of the hinge shaft; and sector protrusions formed in the circumferential direction of the output shaft and matched with the sector slots are arranged at the outer edge of the end face of one end, facing towardsthe hinge shaft, of the output shaft. The actuator check valve has the advantages that normally closed or normally open control can be performed, maintenance is convenient, and tightness is high.

Description

technical field [0001] The invention relates to the field of valves, in particular to an actuator check valve. Background technique [0002] Swing check valve, also known as one-way valve or check valve, is used to prevent the medium in the pipeline from flowing backward. The opening and closing parts are opened or closed by the flow and force of the medium to prevent the backflow of the medium. The valve is called a check valve. Check valves belong to the category of automatic valves, and are mainly used on pipelines with one-way flow of medium, and only allow the medium to flow in one direction to prevent accidents. This type of valve should generally be installed horizontally in the pipeline. [0003] The swing check valve adopts a built-in rocker arm swing structure. All the opening and closing parts of the valve are installed inside the valve body and do not penetrate the valve body. Except for the sealing gasket and sealing ring used in the middle flange, the overall...

AI Technical Summary

Problems solved by technology

[0004] Its opening method is often realized by the pressure difference of the internal medium, but it cannot be maintained in the later pipeline maintenance or kept in a normally open or normally closed state according to actual needs.

It will be more troublesome to empty the medium in the pipe, so it is necessary to design a swing check valve that can control its normally open or normally closed according to the demand, and can effectively guarantee the sealing performance

Images