BOTTOM VALVE Russian patent published in 2005 - IPC

FIELD: valving engineering.

SUBSTANCE: bottom valve comprises cylindrical hollow housing made of a pipe with seat in its top section, bottom threaded section, and stop flange made on the outer surface of the housing below the seat. The overflow pipe is made in block with the housing and positioned from its side. The fastening nut is mounted on the threaded section of the housing. The flexible sealing ring of rectangular cross-section is set on the housing and interposed between the stop flange and fastening nut. The flat closure member is provided with two levers and is secured through a pivot for permitting rotation with respect to the seat. The bottom end of the tie is secured to the closure member and its top end is secured to the starting device. The float is secured to the closure member. The pivot is defined by the cantilever horizontal pipes arranged on the overflow pipe. Each pipe receives pin. The pin is made on each of the levers of the flat closure member. The float is made of two rigid shells. Each of the shells is secured to one of the levers. The shells receive a solid material whose density is less than that of the water. The center of gravity of each of the shells is shifted over the horizon with respect to the pin away from the site where the lever is connected with the flat closure member.

EFFECT: enhanced reliability and simplified structure.

4 cl, 3 dwg