Closed drainage nursing device for thoracic cavity

The utility model belongs to the technical field of nursing equipment, and particularly relates to a thoracic cavity closed drainage nursing device which comprises a rack, a lead screw, a supporting plate, a drainage cylinder, a negative pressure device, a drainage tube, a clamping plate and a limiting clamping plate. A lead screw is installed in the rack through a lead screw seat, a lead screw motor in driving connection with the lead screw is installed at the top in the rack, the two ends of a supporting plate are fixedly connected with lead screw sliding blocks through connecting rods, a drainage cylinder, a water seal bottle and a negative pressure device are arranged on the supporting plate, and the drainage cylinder is communicated with the water seal bottle through a connecting pipe. A drainage tube sequentially penetrates through the fixing frame and the top plate until being inserted into the drainage cylinder, and the drainage tube is clamped and limited sequentially through the limiting clamping pl