Local low-pressure penetration detection device

The utility model discloses a local low-pressure penetration detection device, and relates to the technical field of penetration detection of civil aviation auxiliary power devices. The device comprises a local detection cover, an air pumping cylinder and an injector, wherein the local detection cover is provided with a detection port, a pumping hole and a liquid inlet; the periphery of the detection port is provided with a sealing heat insulation structure used for sealing the periphery of the defect part of the part; the air exhaust cylinder is provided with an air exhaust pipe, penetrates through the pressure exhaust hole through the air exhaust pipe, is connected to the inner cavity of the local detection cover and is used for exhausting air from the inner cavity of the local detectioncover; the injector is provided with a connecting hose, penetrates through the liquid inlet hole through the connecting hose, is connected to the inner cavity of the local detection cover and is usedfor injecting a penetrati