BALL COCK Russian patent published in 2017 - IPC F16K5/06 F16K31/02 F16K31/54 

FIELD: machine engineering.

SUBSTANCE: during a power failure and power plant protection system deenergized floating sleeve under the action of axial movement of the spring moves up and disengages from the projections of the intermediate shaft. The actuator drive shaft is released from connection with intermediate shaft. The spring rails are able to turn over the tooth disc with the intermediate shaft up to 90° degrees and set the ball valve ball valve to the "CLOSED". During the rotation of the ball valve, the resiliently sealing element does not contact the spherical surface of the annular element, which eliminates wear and ensures sealing of the sealing joint during the entire operational period. On the outer surface of the annular element, in the immediate vicinity of the seal, a narrow annular band is provided which provides the angular and axial mobility of the annular element. On the outer surface of the ball valve, a groove is formed in the form of a part of the spherical sector and a rectangular groove for mounting an annular sealing element. The diametral size of the annular band exceeds the diametrical size of the sealing joint to form an annular gasostatic pressure pad.

EFFECT: increase of safety of power units due to automatic instantaneous closing of the ball valve in case of power failure while ensuring the tightness of the sealing joint of the latter.

4 dwg