Transmission of gyration type valve

The utility model discloses a transmission of gyration type valve, comprises a box bod, the box body has upward a box body and a lower box body, still includes T type screw thread screw rod, the square nut of the interior installation of box body down and the driven shift fork that receives, valve rod that install and that pass this time box body in the box body under still including, outside the box body, the tip adopted round pin connection form solidifying the hand wheel under this T type screw screw rod polished rod part was stretched out, on the shift fork had the cylinder boss of U type open -ended one end joint on this square nut, the other end of this shift fork passed through the key and is connected with the valve rod. The utility model discloses change the worm gear structure into the screw nut structure, it is more simple, small and exquisite than prior art's structure, reduced box body volume and weight, reduced occuping of installation space, be less than DN50's valve body volume phase -match with the bore, still improve driven mechanical efficiency, reduced subsequent maintenance cost.