| 摘要 |
FIELD: machine building. ^ SUBSTANCE: safety valve is designed as component of pulse-protective device for protection from excessive pressure in boiler units, pipelines, and vessels operating under pressure and in other objects of thermal power plants. The safety valve consists of case 1 with internal surface 2, of supplying 3 and withdrawing 4 branches and of a shut-off element. The shut-off element consists of seat 5 made in case 1 and of plate 6 opening towards flow and coupled with a servo-drive by means of spring-loaded rod 7. In case 1 there is made circular groove 8 restricting seat 5 of the shut-off element forming edge 9 on internal surface 2 for preliminary flow separation. ^ EFFECT: elimination of turbulisation zone in channel of shut-off element and considerable increase of effective diametre of medium flow passage in minimal passage section of safety valve. ^ 3 cl, 2 dwg |
