SAFETY VALVE Russian patent published in 2023 - IPC F16K15/03 F16K17/10 

FIELD: valves.

SUBSTANCE: invention relates to shut-off devices with a rotary locking body and is intended for installation in wells of oil and gas condensate fields to automatically shut off a high-pressure pipeline in the event of an emergency pressure rise or drop in it. The shut-off valve comprises a body, inlet and outlet flanges, a seat, a rotary shut-off element located in the body, interacting with the drive of the actuation device for decreasing and/or increasing pressure located on the body, holding the shut-off body in the open position, a latch with stops and a sensitive element made in the form of a rod loaded with springs, connected with a latch that holds the stopper in the open position with stops. The shut-off element is made in the form of a plate, the seat is made removable and installed in the bore of the outlet flange, sealed with a rubber ring and fixed in the axial direction by the plate fastening bracket and the strap, the actuation device drive is of spring type and equipped with a position indicator of the sensing element rod, configured for visual control of the position rod, and movable scales of the response pressure of the sensing element adapted for mounting on the scales of the actual response pressures of the sensing element during adjustment. The shut-off valve has a relatively simple design, reliable when actuated by a pressure drop or rise and shutting off the pipeline.

EFFECT: replacing the seat in case of leakage of the shut-off body and visual control over the position of the stem of the sensitive element and the response pressures of the sensitive element during adjustment and during operation of the valve.

1 cl, 3 dwg