Pneumatic intrinsically safe combined acousto-optic annunciator

The utility model discloses a pneumatic intrinsically safe combined acousto-optic annunciator, which comprises an air supply pipeline, a generator impeller, a direct-current generator and an acousto-optic annunciator, the air supply pipeline is connected with the generator impeller, the generator impeller is in transmission connection with the direct-current generator, and the direct-current generator is connected with the acousto-optic annunciator; an air supply pipeline stop valve is arranged on the air supply pipeline, and a plug connected with the next annunciator is arranged at the end part of the air supply pipeline; an air inlet is formed in the end part, far away from the plug, of the air supply pipeline; the generator impeller is provided with an exhaust port, and the exhaust port is provided with an exhaust silencer. Compared with the prior art, the device has the advantages of simple structure, convenience in use, energy conservation and safety as pneumatic energy is used as a coal mine return airw