Grinding wheel valve with integrally detachable valve core

The invention relates to a grinding wheel valve with an integrally detachable valve core. The grinding wheel valve comprises a valve body, wherein the valve body is sequentially provided with a fixedcavity, a fluid inlet cavity and a fluid outlet cavity which communicate with one another from top to bottom; an inlet flow channel and an outlet flow channel are respectively formed in the positions,opposite to the fluid inlet cavity and the fluid outlet cavity, of the side wall of the valve body; the top of the fixed cavity is open; a valve element assembly comprises a valve element sleeve, a grinding wheel pair and a valve rod; the valve element sleeve is installed in the fluid inlet cavity in a sealed mode, the grinding wheel pair is installed at the inner bottom of the valve element sleeve and comprises a fixed grinding wheel and a movable grinding wheel which are provided with circulation channels, and the movable grinding wheel rotates along with the valve rod to change a connection or disconnection state o