PIPELINE RESISTANCE MONITORING DEVICE WITH TWO-STAGE FILTRATION SYSTEM Russian patent published in 2020 - IPC B01D35/143 G01L19/12 

FIELD: pipelines.

SUBSTANCE: invention relates to automatic signalling devices and can be used in shutoff pipeline valves for determination of timely cleaning of the filter and diagnostics of the state of the supply system. Pressure difference indicator comprises housing, in which there are isolated holes, in one of which spring-loaded reed relay is installed, and in the second one - movable system with permanent magnet, at that holes are arranged in parallel. Movable system consists of fixed bush with spring-loaded piston and guide, and permanent magnet is fixed in piston body perpendicular to its axis in plane passing through reed switch axis and spring-loaded. Device also includes a second piston with a built-in magnet and a spring, a rod with an adjusting nut, wherein the piston is installed in the third insulated hole parallel to the reed contact and separates the inlet filter pipeline and the atmosphere. One end of the spring rests against the piston and the other against the body. Rod with one end is rigidly fixed on the piston on the side of the spring, and the second one passes through the hermetic hole in the housing, at the same time the adjusting nut is wrapped on its free end.

EFFECT: technical result is expansion of functional capabilities of pressure difference indicator.

1 cl, 2 dwg