PROCEDURE FOR CONTROL OVER TIGHTNESS OF BALL VALVE OF MULTI-PURPOSE ACCESSORIES OF MAIN AND DEVICE FOR ITS IMPLEMENTATION (VERSIONS) Russian patent published in 2011 - IPC G01M3/08 F17D5/02 F16K5/06 

FIELD: machine building.

SUBSTANCE: group of inventions refers to tightness tests of ball valves of multi-purpose accessories (MPA) of main. The procedure for check of ball valve tightness of multi-purpose accessories of mains consists in connection of a drain tube to a cavity of the checked valve and in measurement of static pressure in pipelines of high and low pressure in the main, and also in the cavity of the ball valve. Also, successively in time, first the low pressure pipeline of the main is connected with the drain tube; under the set mode there is measured flow rate of transported medium downstream through the first packing of the ball valve. Further, the high pressure pipeline is connected and flow rate is measured through the second packing of the ball valve. Finally, there is measured summary flow rate of transported medium running through the first and second packing of the ball valve. There are compared values of measured summary flow rate with sum of earlier measured values of flow rates. If summary flow rate is not equal to sum of earlier measured values of flow rates, there is diagnosed leak of transported medium through the ball valve into atmosphere. There are disclosed versions of devices for check of tightness of the ball valve of multi-purpose accessories.

EFFECT: upgraded accuracy of measurements of gas flow rates due to direct measurements of gas flow rates though each packing of MPA downstream of gas; evaluation of gas flow rate leaking to atmosphere.

15 cl, 2 dwg