Matched connecting piece for locking gas detection equipment and calibration equipment

The utility model relates to a matched connecting piece for locking gas detection equipment and calibration equipment, the detection equipment is used for quantitatively analyzing air on site, and the calibration equipment is used for providing calibration gas with known concentration for the detection equipment; the detection device and the calibration device are in gas circuit connection through the gas circuit connector, and then the function that the calibration device calibrates the detection device is achieved. The gas circuit connector comprises a self-locking quick-plug female connector communicated with a gas circuit of calibration equipment and a self-locking quick-plug male connector arranged on detection equipment, the gas circuit connector is characterized in that the matched connecting piece comprises a fixed bushing, a lifting cover plate and an elastic element which are arranged on the calibration equipment, and the fixed bushing is used for fixing the self-locking quick-plug female connector;