Quick-change type exhaust valve for dam bag of rubber dam

The utility model provides a rubber dam bag quick-change type exhaust valve which comprises an isolating valve, the top of the isolating valve is fixedly connected with a connecting pipe, the top of the connecting pipe is fixedly connected with a lower mounting plate, and lower open grooves are formed in the corners of the left side and the right side of the top of the lower mounting plate. Connecting lugs are fixedly connected to the positions, located on the front side and the rear side of each lower open groove, of the bottom of the lower mounting plate, a round rod is arranged between the connecting lugs, a threaded rod is fixedly connected to the top of the round rod, and the outer side of the threaded rod is sleeved with a locking nut; according to the exhaust valve for the rubber dam bag, the lower mounting plate, the lower open groove, the connecting lugs, the upper mounting plate, the upper open groove, the round rod, the threaded rod and the locking nut are used in cooperation, so that the exhaust v