DEVICE FOR PRESSURE-TIGHTNESS TESTING Russian patent published in 2007 - IPC G01M3/26 

FIELD: testing engineering.

SUBSTANCE: device comprises reference vessel, pressure source connected with the reference vessel through the valve, pipeline composed of two sections and provided with valving member made of a pressure-tight tank partially filled with liquid, and two pipes rigidly connected with the tank. The open faces of the pipes are submerged into the liquid, and the other ends are connected with sections of the pipeline. One end of the pipeline is connected with the reference vessel, and the other one is connected with the article. The device also has indicator provided with movable baffle whose first space is in communication with the reference vessel, and the second space is in communication with the reference vessel from the side opposite to the valving member. The device is provided with the unit for rotation around the axis that lies in the plane of the liquid surface . The end of the pipeline is connected with the tank of variable volume that provides reciprocation of the movable baffle of the indicator and maintains the pressure variations in the test device within a given range.

EFFECT: enhanced reliability.

3 dwg