FLUID FLOW METRE OF VARIABLE PRESSURE DROP Russian patent published in 2009 - IPC G01F1/36 G01F15/10 

FIELD: instrument engineering.

SUBSTANCE: invention refers to consumer-supplied working medium metres, e.g. for metering a hydrating inhibitor (methanol) in processing line of gas field and gas wells. In service-pressurised body 2 of the metre, there is a metering unit of a micromanometer 1 under lens 4. In a pass of the body, there is a restriction that is orifice plate 3 pressed with stopper 5. Metering unit 1 of the micromanometer is isolated from contact with the working medium by elastic divider 6 and along with the lens pressed with nut 7 wherein radial holes 8 are formed to increase amount of incident light on a micromanometer scale. The cavity B of the metering unit knot is filled with nonfreezable liquid (silicone liquid or multigrade hydraulic oil).

EFFECT: invention allows for low-flow metering (less than 50 l/hour) with great absolute pressures without power supply, as well as for improving performance reliability in minimal geometries of metres due to constraint-environment constructability, eg for well location.

2 cl, 2 dwg