Method for protecting the seal in the sealing set of a ball valve obturator and the sealing set of a ball valve obturator

摘要

A way of protection of a seal in an assembly sealing a closing component of a ball valve, in which the seal, in a non - loaded state, one places in the seat of the sediment ring, characterised in that, during the assembly, one subjects the seal ( 2 ) to a load which causes strain of the seal ( 2 ) in limits of its elasticity and in that state one shifts the seal ( 2 ) deeply, into the seat ( 5 ) of the sediment ring ( 1 ), moreover in the moment of position, in which the protrusion ( 4 ) of the seal ( 2 ) will cover itself with the groove ( 3 ) in the sediment ring ( 1 ), stresses are released in the seal ( 2 ) and the seal ( 2 ), by its protrusion ( 4 ) jumps into the groove ( 3 ) of the sediment ring ( 1 ) and the seal ( 2 ) undergoes self - protection by locking. An assembly sealing a closing component of a ball valve,according to the invention, having a sediment ring and a seal placed in circumferential seat from the frontal side of the sediment ring, characterised in that, the sediment ring ( 1 ) in its frontal part, has got a groove ( 3 ), advantageously circumferential, situated in an inner part of the sediment ring ( 1 ), and on a side, outer surface of the seal ( 2 ) there is a protrusion ( 4 ), advantageously circumferential, moreover in assembled state, a joint of the seal ( 2 ) with the sediment ring ( I ) is non-separable, and in that joint the protrusion ( 4 ) of the seal ( 2 ) is mounted in the groove ( 3 ) of the sediment ring ( 1 ).