Conical valve can be roughly divided into buried pipe, tapered valve body, sleeve, worm reducer, screw rod, rod and balance beam and so on. Its structure is divided into outer sleeve form and inner sleeve form, the outer sleeve form is the valve body fixed, and uses the worm gear reducing screw machine to open and close the movable outer sleeve, and achieves the valve body opening and closing. It has the following advantages:
1., hydraulic conditions are good, with higher than other valve flow coefficient u=0.75 ~ 0.83 or higher.
2., simple structure, light weight.
3., opening and closing force is small, manpower operation is light, suitable for non power supply of small and medium-sized water conservancy site, if necessary, the user can in the worm gear reducer on the other side of the motor connection, into the electric operation of headstock mechanism.
4., the discharge of water when the tongue is trumpet shaped, air diffusion, aeration, energy dissipation effect is good, generally do not do energy dissipation measures, such as set to submerged outflow, then the underwater energy dissipation is also very simple.
5., equipment layout is compact, flexible operation, convenient and reliable operation and management.