Anaesthetic-concentration-adjustable device

The invention provides an anaesthetic-concentration-adjustable device. The device comprises a base; two horizontal pipes distributed up and down are arranged above the base; the horizontal pipe on thelower side is fixedly connected with the base; the two horizontal pipes are fixedly connected; annular partition plates which are symmetrical from side to side are arranged on the middle parts of thehorizontal pipes respectively; the inner side of each annular partition plate and the inner periphery of the corresponding horizontal pipe form a gas storage cavity; the interiors of the annular partition plates are fixedly connected with the gas inlet ends of first one-way valves respectively; first pistons are respectively arranged on the left sides and right sides of the interiors of the horizontal pipes; the inner side of each first piston, the outer side of the corresponding annular partition plate, and the inner periphery of the corresponding horizontal pipe form a gas inlet cavity; thegas inlet cavities and the gas storage cavities are communicated through the first one-way valves; the outer periphery of each first piston is respectively matched with the inner wall of the corresponding horizontal pipe in a sliding contact way; first through holes are respectively formed in the middles of the outer sides of the first pistons. The anaesthetic-concentration-adjustable device is ingenious in design and convenient in use and operation, and can continuously mix anesthetic gas and loaded gas in small batches; the mixing is more uniform; waste caused by residues after mixing of alarge quantity of anesthetic gas is avoided.