Low-pain chest drainage tube

The utility model discloses a chest drainage tube with low pain, which relates to the technical field of medical equipment and comprises an inner tube, a circular ring is arranged at one end of the outer surface of the inner tube, a threaded tube is arranged on one side of the outer surface of the circular ring, an outer tube is arranged at the end of the threaded tube, and an internal thread is arranged at one end of the inner surface of the outer tube. A conical pipe is arranged at one end of the outer surface of the outer pipe, a limiting disc is arranged at one end of the inner surface of the conical pipe, and a first arc-shaped hole is formed in the outer surface of the limiting disc. Compared with an existing common thoracic cavity drainage tube, the low-pain thoracic cavity drainage tube has the advantages that when the inner tube is replaced, firstly, the circular ring is rotated to drive the threaded tube to be separated from the inner thread, then the inner tube is completely drawn out, then a new i