Impeller sand blasting equipment of centrifugal sand pump

The invention discloses impeller sand blasting processing equipment of a centrifugal sand pump, the impeller sand blasting processing equipment comprises sand blasting equipment, the sand blasting equipment comprises a movable mounting rack, a sand storage container, a pump body, a material conveying pipe, a sand blasting gun and a dust suppression mechanism, the top of the movable mounting rack is connected with the sand storage container, the pump body is mounted at the lower right corner of the sand storage container and is connected with the sand blasting gun through the material conveying pipe, and the dust suppression mechanism is connected with the sand blasting gun through the material conveying pipe. The dust suppression mechanism comprises a telescopic dust collection outer cover, a backflow pipeline, a dust falling cover and a discharging disc, the telescopic dust collection outer cover is installed on the outer side of the sand blasting gun, the tail end of the telescopic dust collection outer cov