Ceramic on-off valve for numerical control sealing dispenser

The utility model relates to the field of sealing glue dispenser equipment, in particular to a ceramic on-off valve for a numerical control sealing glue dispenser, which comprises a stirring cup, an on-off valve body, a locking nut, a glue outlet nozzle, a glue mixing cavity, a valve cylinder A assembly, a valve cylinder B assembly and a ceramic valve ring and valve needle assembly. The on-off valve body is arranged at the lower part of the stirring cup and is connected with the stirring cup through a connecting screw; the ceramic valve ring and the ceramic valve needle are high in matching precision, gas and liquid sealing (the outer diameter of the ceramic valve needle and the inner diameter of the ceramic valve ring are sealed) can be achieved under the condition that an O-shaped ring is not installed, and meanwhile the ceramic valve needle and the ceramic valve ring are sealed under the condition that the O-shaped ring is not installed. Friction force between the ceramic valve needle and the ceramic valve