VALVE ASSEMBLY Russian patent published in 2015 - IPC E21B33/38 

FIELD: machine building.

SUBSTANCE: invention relates to mining, namely to valve devices. The valve assembly contains fixed part (2; 6) and bushing (3; 7). The bushing (3; 7) is designed with possibility of hole (33; 72) rotation until its alignment with the channel to ensure liquid passage through the channel and hole (33; 72), when bushing (3; 7) is in opened position. The bushing (3; 7) is designed with possibility of hole (33; 72) rotation from the channel to ensure liquid passage through the channel, when bushing (3; 7) is in closed position. Fixed part (2; 6) and bushing (3; 7) create a ring space between the fixed part and bushing (3; 7). The ring space is limited in axial direction by two sealing elements in axial directions of the bushing (3; 7) and fixed part (2; 6). One of two sealing elements is located at one side of the channel, and second of two sealing elements is located at opposite side of the channel. The ring space has connection by liquid with channel of the fixed part (2; 6).

EFFECT: prevention of undesirable environment pollution during connection and disconnection of quick-release nipple and connecting unit.

12 cl, 15 dwg