Coupling and locking mechanism for plenum chamber and pipeline

The invention relates to a plenum chamber and pipeline coupling locking mechanism, which belongs to the field of wind tunnel test equipment, and comprises a locking base, a fixed seat, a guide seat, a guide sleeve, a spring, a vertical pull rod, a vertical guide ring, a support plate, a limiting guide rod and two transverse guide rings, and the guide sleeve and the vertical pull rod are relatively fixed through a positioning pin; the supporting plate is located above the guide seat, one side of the supporting plate is fixedly connected with the side wall of the wind tunnel plenum chamber, the supporting plate is fixedly connected with a vertical guide ring and two transverse guide rings, the upper end of the vertical pull rod is inserted into the vertical guide ring, the transverse limiting guide rod is transversely placed in the two transverse guide rings, and the transverse limiting guide rod is fixedly connected with the vertical guide ring. The inner side end of the transverse limiting guide rod makes con