Mechanical blasting sprayer

The embodiment of the invention discloses a mechanical blasting sprayer, comprising a tank, an impact wave plate which is arranged on one side of the tank and can swing, and a spraying mechanism which is fixed in the tank. The spraying mechanism comprises a pipeline, a general control valve, a pull bar, a hanging bucket and a three-way valve, wherein the pipeline is fixed in the tank; the generalcontrol valve is arranged on the pipeline; the pull bar connects the impact wave plate and the switch handle of the general control valve; the hanging bucket is connected with a reverse extension section of the switch handle via a pulley, and a water drain hole is arranged at the bottom of the bucket; and the three-way valve is arranged on the pipeline above the hanging bucket. According to the invention, the general control valve is opened by the impact wave when the blast occurs, and the mist spray is further generated; the hanging bucket falls to drive the switch handle to rotate, so as toclose the general control valve, and the whole operation process is rapid and sensitive; the energy is stored in such a way that water is stored in the hanging bucket, and the spraying time can be adjusted by adjusting the openness degree of the three-way valve. The whole device is safe and reliable, and has simple structure and convenient maintenance.