Detachable corrugated pipe stop valve

A detachable corrugated pipe stop valve comprises a valve body, a valve cover and a valve rod, the valve cover is arranged above the valve body, a valve cavity is formed in the valve body, a valve element is arranged in the valve cavity, one end of the valve rod penetrates through the valve cover and extends into the valve cavity to be connected with the valve element, and a detachable corrugated pipe structure is arranged on the portion, extending into the valve cavity, of the valve rod. The detachable corrugated pipe structure comprises an upper corrugated pipe seat, a corrugated pipe body and a lower corrugated pipe seat, and the detachable corrugated pipe structure is arranged outside the valve rod, so that stop valves of different sizes are not prone to deformation after the upper corrugated pipe seat and the lower corrugated pipe seat are installed on the stop valves. Corrugated pipe bodies of different sizes can be replaced according to the size of an internal valve rod and the requirements of other va