Hydraulic machinery protection mechanism and device

The utility model discloses a hydraulic machinery protection mechanism and device, and relates to the technical field of hydraulic machinery, the hydraulic machinery protection mechanism comprises an anti-blocking protection mechanism and a protection shell mechanism, the anti-blocking protection mechanism comprises a filter box and a main filter screen impurity removal part arranged at a water inlet of the filter box, and multiple auxiliary filter screen installation parts are additionally arranged on one side of the filter box. A first flange connecting pipe is arranged at the water outlet of the filter box. According to the anti-blocking water conservancy machine, the anti-blocking protection mechanism is additionally arranged at the water inlet of a common water conservancy machine, impurities in water can be effectively blocked, and the situation that the impurities enter a pipeline to damage the water conservancy machine is avoided as much as possible; the scraper can slide on the screen and scrape off