Vacuum kneading device for plugging agent production

The utility model discloses a vacuum kneading device for producing a blocking agent. The vacuum kneading device comprises a kneading kettle, a kettle cover detachably arranged on the kneading kettle, and a jacket arranged outside the kneading kettle, a pair of stirring blades matched with each other is arranged in the kneading kettle; a medium inlet pipe and a medium outlet pipe are arranged on the jacket; an air inlet pipe, a vacuumizing pipe, a vacuum meter, a pressure meter and a thermometer are sequentially arranged on the kettle cover; a first dustproof device, a lower filter screen and an upper filter screen are sequentially arranged in the vacuumizing pipe from bottom to top; the upper end of the vacuumizing pipe is in a closed state, a communicating pipe communicated with the interior of the vacuumizing pipe is arranged on the side wall, located above the upper filter screen, of the vacuumizing pipe, and the other end of the communicating pipe is communicated with the inlet end of a vacuum pump. 本实用新型