Air tightness detection device for hydraulic oil cylinder

The utility model discloses an air tightness detection device for a hydraulic oil cylinder, and relates to the technical field. The device comprises a fixed bottom plate and a sealing tank, air cylinders are installed on the left side and the right side of the upper end of the fixed bottom plate, a supporting frame is arranged on the inner sides of the air cylinders, a display screen is installed in the middle of the upper end of the fixed bottom plate, a clamping ring is installed in the middle of the top end of the supporting frame, and an inflation inlet is formed in the left side of the clamping ring; the sealing tank is fixed to the bottom end of the clamping ring, a first inflator pump is fixed to the inner wall of the supporting frame, and a first connector is formed in the bottom face of the sealing tank. The air bag is inflated through the first inflator pump, so that the air bag is expanded, the inner diameter of the clamping ring can be adjusted, oil cylinders with different diameters can be clampe