A
drill bit cooling dust-proof device comprises an outer cylinder body and an inner cylinder body both in a vertical arrangement, wherein the inner cylinder body is coaxially arranged inside the outercylinder body, an annular cavity is formed between the outer cylinder body and the inner cylinder body, and the upper ends of the inner cylinder body and the outer cylinder body are fixedly connectedthrough an upper annular plate; the lower end of the inner cylinder body is lower than the lower end of the outer cylinder body, and a conical
barrel is fixedly connected to the lower end of the outer cylinder body; the structure of the conical
barrel is thin in the upper and thick in the lower, the lower end of the conical
barrel and the lower end of the inner cylinder body are fixedly connectedthrough a lower annular plate, and a
pipe joint is arranged on the upper part of the outer cylinder body; a plurality of nozzles are evenly arranged on the lower annular plate in the circumferentialdirection, and an upper bearing
assembly and a lower bearing
assembly are arranged on the upper and lower parts of the inner wall of the inner cylinder body correspondingly. According to the device, the spread of dust during the construction of the
drill bit is effectively prevented, and an auxiliary effect of cooling the working
drill bit is achieved, so that the
physical health of constructors is greatly guaranteed, and at the same time, the service life of the
drill bit is prolonged, and the construction level is improved.