Rare earth permanent magnet hydrogen decrepitation reaction kettle

The rare earth permanent magnet hydrogen decrepitation reaction kettle comprises a heat conduction mechanism, an outer reaction kettle mechanism is arranged in the heat conduction mechanism, an inner reaction kettle mechanism is arranged in the outer reaction kettle mechanism, and the two ends of the inner reaction kettle mechanism and the two ends of the outer reaction kettle mechanism are connected with first bearing seats correspondingly; the inner reaction kettle mechanism comprises an inner reaction kettle, a plurality of open holes are formed in the inner wall of the inner reaction kettle in a penetrating mode at equal density, the diameter of the open holes is 3-10 mm, alloy reaching the grain size enters the outer reaction kettle from the holes at any time, the inner wall of the inner reaction kettle is fixedly connected with continuous spiral blades, and one end of the inner reaction kettle is fixedly connected with a support; the inner wall of the opposite end of the inner reaction kettle is connect