Nozzle for spraying liquid, especially water in a snow production cannon

Nozzle for spraying liquid in a snow production cannon consisting of a cylindrical body (1) and a cap nut (2) having an axial spraying hole (5) connected from inside by an inlet cone (6) to a vortex chamber (7) and having a swirl insert (4) mounted between the body (1) and the nut (2) which divides a fluid supply channel (9) with a wall (8) having at least two vortex channels (10) and the axes of said channels are situated symmetrically and swirly-obliquely around the axis of the nozzle and at the same time the body, the nut and the swirl insert are threaded connection tightened through elastomeric material having flexible-elastic characteristic, characterized by that the swirl insert (4) has a flange (11) with which said insert is axially fixed between the nut (2) and the body (1) through a front (12) and a rear (13) sealing rings, and both of said rings have circular cross-section and the front sealing ring (12) is mounted in a rectangular groove (14) made on the face of the swirl insert (4) and said face is adjacent to the face of the nut (2), and the rear sealing ring (13) is mounted in a semicircular socket (15) made at the inner corner of the rear surface of the flange (11), moreover from the side of the body (1) the rear sealing ring (13) is encircled by a quadrant-of-a-circle socket (16), having a cone input (17) and in the position of tightening of the nut (2) an axial deformation Δ of the rear sealing ring (13) is from 20 to 40% of the diameter D of its cross-section, while the dimension of the gap s2 between the faces of the flange (11) and the body (1) is no greater than the deformation Δ, in addition, the rear sealing ring (13) is made of elastomer having hardness of 60-90 IRHD and its hardness is greater than the hardness of the front sealing ring (12).