Vacuum drier

The utility model relates to a vacuum drier, including a jar body, jar body has the swing drives device through empty spindle connection, wears to be equipped with vacuum tube in the hollow shaft, and vacuum tube is connected with vacuum filter, and the vacuum tube intercommunication has the vacuum pump, wears to be equipped with the feed liquor pipe in the vacuum tube, and feed liquor pipe intercommunication has the shower, the feed inlet detachably of the jar body is connected with first shrouding or second shrouding, the discharge gate detachably of the jar body is connected with the third shrouding, the second shrouding is connected with the purification water pipe, be provided with on -line sampling device on the third shrouding, on -line sampling device upper portion is the valve body, be provided with the case in the valve body, set up the disk seat between valve body and the case, the valve body lower part is the valve gap, set up a sampling groove in the case, the outside extension of case is provide