Anti-vibration spiral protective sleeve

The utility model discloses an anti-vibration spiral protective sleeve. The device comprises a flange, a protective sleeve and a spiral flange, bolt holes are uniformly formed in the flange along thecircumference; a central hole is drilled in the center of the flange; the protective sleeve penetrates through a central hole of the flange; the protective sleeve is formed by combining a sleeve without a spiral flange and a sleeve with a spiral flange; a spiral flange is spirally arranged on the outer wall of the spiral flange sleeve; the protective sleeve is reasonable in structural design, vibration of the protective sleeve is mainly caused by a Karman vortex street formed by media flowing through the protective sleeve on the rear portion of the protective sleeve, the spiral flange arrangedaround the protective sleeve can cut off fluid, and therefore the obvious Karman vortex street is prevented from being formed. By reducing the amplitude of dispersed vortexes, vibration of the sheathis avoided, meanwhile, the