Quick connecting device for non-return exhaust valve of large-flux range hood

The utility model relates to a quick connecting device for a non-return exhaust valve of a large-flux range hood, which comprises a core shift lower body, a main valve body, a connecting pipe, a PVC (polyvinyl chloride) pipe and a foreign matter anti-drilling net, and further comprises a main valve body quick connecting mechanism, the main valve body quick connecting mechanism consists of a lantern ring, a fixed lower hook and an elastic silica gel ring, and the connecting pipe consists of a sleeve pipe, a straight sleeve pipe and a telescopic hose. The sleeve ring is sleeved on the sleeve pipe and is stopped at the front end of the sleeve pipe, the plurality of fixed lower hooks are uniformly distributed and fixedly arranged on the concentric end face of the core shift lower body, the upper ends of the plurality of elastic silica gel rings are sleeved on the sleeve ring, and the lower ends of the plurality of elastic silica gel rings are respectively sleeved on the corresponding fixed lower hooks. The lower