Double-layered intelligent connecting device for chemical gas delivery pipeline

The utility model relates to a double-layered intelligent connecting device for a chemical gas delivery pipeline. The connecting device comprises an inner layer and an outer layer, wherein the inner layer is provided with a short connecting sleeve; internal threads at two ends of the connecting sleeve and external threads at the end parts of two long pipes connected are tightened; the outer layer comprises a connecting pipe; internal threads are arranged at the two ends of the connecting pipe; an end cover is connected with the connecting pipe through external threads; a central hole is formed in the end cover, and sleeves the long pipes; sealing rings are mounted on the end cover at the connecting part of the end cover and the connecting pipe as well as the connecting parts of the end cover and the long pipes; a gas sensor and a button cell are adhered on the inner wall of the connecting pipe; a small bolt is mounted on the connecting pipe; an LED lamp is mounted outside the connecting pipe through a conducting wire in an inner hole of the small bolt. The connecting device has the following two advantages: (1) the double-layered structure enables the connecting device to be safer and more reliable; (2) when the inner layer leaks, the gas sensor can allow the LED lamp to be lightened, so as to facilitate discovering and inspecting for the working personnel.