High-strength diffuser

The invention discloses a high-strength diffuser. The high-strength diffuser comprises a movable cover, a fixed cover, a bottom cover, a first grid layer, a second grid layer and a third grid layer, wherein a first through hole is formed in the center position of the movable cover, three counter bores distributed in an annular array mode are formed in the center side part of the movable cover andthe center side part of the bottom cover correspondingly, a sleeve is arranged in the first through hole, three guide grooves distributed in an annular array mode are formed in the inner wall of the sleeve, six first threaded rods penetrate through the six counter bores correspondingly, the six first threaded rods are in threaded connection with six first nuts correspondingly, the six first nuts are installed in the six counter bores through the six first threaded rods, and three second threaded rods arranged in an annular array mode are welded and fixed to the center side part of the bottom cover. According to the hi