One-way valve for petroleum equipment

The utility model relates to the technical field of petrochemical industry, and discloses a one-way valve for petroleum equipment, which comprises a valve body, a splitter plate is fixedly arranged in the valve body, and a through hole is arranged in the valve body under the separation of the splitter plate; the moving plate slides to push the annular plate to move, the movement of the annular plate is matched with the channel switch to detect the separation and sealing critical position of the sleeve plug and the port, and meanwhile the moving plate slides to drive the piston to slide to push the pressing piece to slide. Under the repulsion effect of the magnetic plate, a pressing piece and a contact strip are matched to detect whether the air pressure in the protective shell is in a normal state or not after a through opening in the valve body is normally opened, and then pressure monitoring on the interior of the protective shell for controlling a sleeve plug to reset in the valve body is achieved; constan