GATE VALVE WITH STRICTION DRIVE Russian patent published in 2021 - IPC F16K31/04 H02N2/02 

FIELD: stop valve devices.

SUBSTANCE: proposed invention relates to stop valve devices; it is designed for opening and closing the fluid flow in a pipeline. The device contains a case, a stop element and a linear stepper striction electric engine consisting of a runner located in a channel of the stop element. The direction of the channel of the stop element coincides with the direction of movement of the stop element when opening or closing the gate valve. The runner is connected to the case. The runner consists of a front striction spacer section, a running striction section, and a rear striction spacer section connected in series. The running striction section increases its length when it is connected to an electric voltage source, causing longitudinal vibration. The front and rear striction spacer sections are braked in the channel of the stop element when they are connected to an electric voltage source, causing transverse vibration. With a certain sequence of connections and disconnections of sections, the runner moves the stop element in the required direction, opening or closing the gate valve.

EFFECT: invention is aimed at reducing the force required for the drive operation and the probability of jamming the stop element in the gate valve case.

10 cl, 8 dwg