| 摘要 |
FIELD: mechanic engineering. ^ SUBSTANCE: invention is related to valve manufacture industry and valves with rolling orifices, in particular. It is designed to control liquid flow rate. Orifice control valve consists of a body with inlet and outlet connections and valve seat. It is situated between inlet and outlet connections. Cutoff member enclosure is projected from valve body between inlet and outlet connections. Partially, section of internal cutoff member enclosure volume makes up control chamber. Cutoff member can be displaced. Its part is installed inside body to enable cutoff member displacement between open or closed positions of the valve. Elastic orifice is connected leak tight to cutoff member and makes leak proof control chamber with regard to part of inlet connection. This orifice has S-shaped cross-section and is made so that cutoff member displacement value inside body at each side is about 20% of outer orifice diameter with regard to central plane of connection between orifice and cutoff member body. Common value of cutoff member displacement inside its body is, at least 40% of outer orifice diameter. Cutoff member can be smoothly displaced in longitudinal direction inside cutoff member body. To direct cutoff member movement, at least one side body surface is provided with a large number of longitudinal vanes. There is design option of orifice control valve manufacture. ^ EFFECT: simplification of valve design; high liquid flow rate under minimum hydraulic losses. ^ 19 cl, 13 dwg |
