Manual mechanism of valve

A manual mechanism of a beyond type valve comprises a valve body, wherein a valve rod sliding vertically is arranged in the valve body, the valve body is provided with a transmission mechanism which drives a valve rod to slide, a big gear wheel is fixed outside the transmission mechanism, the valve body is provided with a pinion meshed with the big gear wheel, and the pinion is coupled with a hand wheel. The manual mechanism of the valve is added with a primary wheel based on existing manual mechanism, thereby overcoming the shortcoming that large-aperture valves are strenuous to open or close due to overlarge torque by using the manual mechanism, simultaneously lowers hand wheel position of manual mechanism of large-aperture valves, facilitates operation in using the manual mechanism, and exceeds existing manual mechanisms.