UNIT FOR WATER TESTING PIPES WITH THREADED ENDS AND PRESSURE PLUG FOR PIN-PIPE END Russian patent published in 2009 - IPC G01M3/08 

FIELD: physics.

SUBSTANCE: mechanism of moving the test pipe is in form of a live roller with lengthwise movement. The attachment fitting of the pressure plug is on a post opposite the test head. In the initial state the pressure plug is put on the attachment fitting, and its outer diametre does not exceed the outer diametre of the coupling end of the pipe. In the pressure plug for the pin-pipe end, a case is made in form of a nut-threaded plug, corresponding to the thread of the pin. In the un-threaded part of the case on the side of the inner surface, there are openings for communication with the cavity of the test pipe. An elastic sleeve gasket is made in form of a diametrically expanding cup under external effect, with a heavy base and inner lugs on the side opposite the base and is put into the threaded part of the case with an annular gap from the inner surface of the test pipe. A rod, movable in the longitudinal direction, is fitted in the case and is provided with a mouthpiece which interacts with lugs of the sleeve gasket. The mouthpiece has an opening for linking the cavity of the pipe with the cavity of the sleeve gasket.

EFFECT: increased reliability and service life, reduced specific quantity of metal of the installation, used for testing internal hydrostatic pressure of threaded pipes of oil products with screwed on sleeve gaskets.

2 cl, 2 dwg